Hanukkah: What's the Big Idea?
מאי חנוכה דתנו רבנן בכה בכסליו יומי דחנוכה תמניא אינון דלא למספד בהון ודלא להתענות בהון שכשנכנסו יוונים להיכל טמאו כל השמנים שבהיכל וכשגברה מלכות בית חשמונאי ונצחום בדקו ולא מצאו אלא פך אחד של שמן שהיה מונח בחותמו של כהן גדול ולא היה בו אלא להדליק יום אחד נעשה בו נס והדליקו ממנו שמונה ימים לשנה אחרת קבעום ועשאום ימים טובים בהלל והודאה
The Gemara asks: What is Hanukkah, and why are lights kindled on Hanukkah? The Gemara answers: The Sages taught in Megillat Taanit: On the twenty-fifth of Kislev, the days of Hanukkah are eight. One may not eulogize on them and one may not fast on them. What is the reason? When the Greeks entered the Sanctuary they defiled all the oils that were in the Sanctuary by touching them. And when the Hasmonean monarchy overcame them and emerged victorious over them, they searched and found only one cruse of oil that was placed with the seal of the High Priest, undisturbed by the Greeks. And there was sufficient oil there to light the candelabrum for only one day. A miracle occurred and they lit the candelabrum from it eight days. The next year the Sages instituted those days and made them holidays with recitation of hallel and special thanksgiving in prayer and blessings.

1 Maccabees 4:36-59 (NRSV)- Hebrew, survives in Koine Greek 200-124 BCE

36 Then Judas and his brothers said, “See, our enemies are crushed; let us go up to cleanse the sanctuary and dedicate it.” 37 So all the army assembled and went up to Mount Zion. 38 There they saw the sanctuary desolate, the altar profaned, and the gates burned. In the courts they saw bushes sprung up as in a thicket, or as on one of the mountains. They saw also the chambers of the priests in ruins. 39 Then they tore their clothes and mourned with great lamentation; they sprinkled themselves with ashes 40 and fell face down on the ground. And when the signal was given with the trumpets, they cried out to Heaven. 41 Then Judas detailed men to fight against those in the citadel until he had cleansed the sanctuary. 42 He chose blameless priests devoted to the law, 43 and they cleansed the sanctuary and removed the defiled stones to an unclean place. 44 They deliberated what to do about the altar of burnt offering, which had been profaned. 45 And they thought it best to tear it down, so that it would not be a lasting shame to them that the Gentiles had defiled it. So they tore down the altar, 46 and stored the stones in a convenient place on the temple hill until a prophet should come to tell what to do with them. 47 Then they took unhewn[d] stones, as the law directs, and built a new altar like the former one. 48 They also rebuilt the sanctuary and the interior of the temple, and consecrated the courts. 49 They made new holy vessels, and brought the lampstand, the altar of incense, and the table into the temple. 50 Then they offered incense on the altar and lit the lamps on the lampstand, and these gave light in the temple. 51 They placed the bread on the table and hung up the curtains. Thus they finished all the work they had undertaken. 52 Early in the morning on the twenty-fifth day of the ninth month, which is the month of Chislev, in the one hundred forty-eighth year,[e] 53 they rose and offered sacrifice, as the law directs, on the new altar of burnt offering that they had built. 54 At the very season and on the very day that the Gentiles had profaned it, it was dedicated with songs and harps and lutes and cymbals. 55 All the people fell on their faces and worshiped and blessed Heaven, who had prospered them. 56 So they celebrated the dedication of the altar for eight days, and joyfully offered burnt offerings; they offered a sacrifice of well-being and a thanksgiving offering. 57 They decorated the front of the temple with golden crowns and small shields; they restored the gates and the chambers for the priests, and fitted them with doors. 58 There was very great joy among the people, and the disgrace brought by the Gentiles was removed. 59 Then Judas and his brothers and all the assembly of Israel determined that every year at that season the days of dedication of the altar should be observed with joy and gladness for eight days, beginning with the twenty-fifth day of the month of Chislev.

2 Maccabees 10:1-8 (NRSV)- Koine Greek, likely sourced from Hebrew 124 BCE

1 Now Maccabeus and his followers, the Lord leading them on, recovered the temple and the city; 2 they tore down the altars that had been built in the public square by the foreigners, and also destroyed the sacred precincts. 3 They purified the sanctuary, and made another altar of sacrifice; then, striking fire out of flint, they offered sacrifices, after a lapse of two years, and they offered incense and lighted lamps and set out the bread of the Presence. 4 When they had done this, they fell prostrate and implored the Lord that they might never again fall into such misfortunes, but that, if they should ever sin, they might be disciplined by him with forbearance and not be handed over to blasphemous and barbarous nations. 5 It happened that on the same day on which the sanctuary had been profaned by the foreigners, the purification of the sanctuary took place, that is, on the twenty-fifth day of the same month, which was Chislev. 6 They celebrated it for eight days with rejoicing, in the manner of the festival of booths, remembering how not long before, during the festival of booths, they had been wandering in the mountains and caves like wild animals. 7 Therefore, carrying ivy-wreathed wands and beautiful branches and also fronds of palm, they offered hymns of thanksgiving to him who had given success to the purifying of his own holy place. 8 They decreed by public edict, ratified by vote, that the whole nation of the Jews should observe these days every year.

Josephus, Antiquities of the Jews: Book XII ch. 7- Koine Greek 93-94 CE

When therefore, the generals of Antiochus’ armies had been beaten so often, Judas assembled the people together, and told them, that after these many victories which God had given them, they ought to go up to Jerusalem, and purify the temple, and offer the appointed sacrifices. But as soon as he, with the whole multitude, was come to Jerusalem, and found the temple deserted, and its gates burnt down, and plants growing in the temple of their own accord, on account of its desertion, he and those who were with him began to lament, and were quite confounded at the sight of the temple; so he chose out some of his soldiers, and gave them order to fight against those guards that were in the citadel, until he should have purified the temple. When, therefore, he had carefully purged it, and had brought in new vessels, the lampstand, the table [of showbread], and the altar [of incense], which were made of gold, he hung up the veils at the gates, and added doors to them. He also took down the altar [of burnt offering], and built a new one of stones that he gathered together, and not of such as were hewn with iron tools. So on the five and twentieth day of the month of Chisleu, which the Macedonians call Apellaios, they lit the lamps that were on the lampstand, and offered incense upon the altar [of incense], and laid the loaves upon the table [of showbread], and offered burnt offerings upon the new altar [of burnt offering]. Now it so happened, that these things were done on the very same day on which their divine worship had stopped, and was reduced to a profane and common use, after three years’ time; for so it was, that the temple was made desolate by Antiochus, and so continued for three years. This desolation happened to the temple in the hundred forty and fifth year, on the twenty-fifth day of the month of Apellaios, and on the hundred fifty and third Olympiad: but it was dedicated anew, on the same day, the twenty-fifth of the month of Apellaios, on the hundred and forty-eighth year, and on the hundred and fifty-fourth Olympiad. And this desolation came to pass according to the prophecy of Daniel, which was given four hundred and eight years before; for he declared that the Macedonians would stop that worship [for some time]. Now Judas celebrated the festival of the restoration of the sacrifices of the temple for eight days; and omitted no sort of pleasures thereon: but he feasted them upon very rich and splendid sacrifices; and he honoured God, and delighted them by hymns and psalms. Nay, they were so very glad at the revival of their customs, when, after a long time of intermission, they unexpectedly had regained the freedom of their worship, that they made it a law for their posterity that they should keep a festival, on account of the restoration of their temple worship, for eight days. And from that time to this we celebrate this festival, and call it Lights . I suppose the reason was, because this liberty beyond our hopes appeared to us; and that hence was the name given to that festival. Judas also rebuilt the walls around the city, and reared towers of great height against the incursions of enemies, and set guards therein.