Understanding Adonai Echad during Av

(1) The Reubenites and the Gadites owned cattle in very great numbers. Noting that the lands of Jazer and Gilead were a region suitable for cattle, (2) the Gadites and the Reubenites came to Moses, Eleazar the priest, and the chieftains of the community, and said, (3) “Ataroth, Dibon, Jazer, Nimrah, Heshbon, Elealeh, Sebam, Nebo, and Beon— (4) the land that Adonai has conquered for the community of Israel is cattle country, and your servants have cattle. (5) It would be a favor to us,” they continued, “if this land were given to your servants as a holding; do not move us across the Jordan.” (6) Moses replied to the Gadites and the Reubenites, “Are your brothers to go to war while you stay here? (7) Why will you turn the minds of the Israelites from crossing into the land that Adonai has given them? (8) That is what your fathers did when I sent them from Kadesh-barnea to survey the land. (9) After going up to the wadi Eshcol and surveying the land, they turned the minds of the Israelites from invading the land that Adonai had given them. (10) Thereupon Adonai was incensed and He swore, (11) ‘None of the men from twenty years up who came out of Egypt shall see the land that I promised on oath to Abraham, Isaac, and Jacob, for they did not remain loyal to Me— (12) none except Caleb son of Jephunneh the Kenizzite and Joshua son of Nun, for they remained loyal to Adonai.’ (13) Adonai was incensed at Israel, and for forty years He made them wander in the wilderness, until the whole generation that had provoked Adonai’s displeasure was gone. (14) And now you, a breed of sinful men, have replaced your fathers, to add still further to Adonai’s wrath against Israel. (15) If you turn away from Him and He abandons them once more in the wilderness, you will bring calamity upon all this people.” (16) Then they stepped up to him and said, “We will build here sheepfolds for our flocks and towns for our children. (17) And we will hasten as shock-troops in the van of the Israelites until we have established them in their home, while our children stay in the fortified towns because of the inhabitants of the land. (18) We will not return to our homes until every one of the Israelites is in possession of his portion. (19) But we will not have a share with them in the territory beyond the Jordan, for we have received our share on the east side of the Jordan.” (20) Moses said to them, “If you do this, if you go to battle as shock-troops, at the instance of Adonai, (21) and every shock-fighter among you crosses the Jordan, at the instance of Adonai, until God has dispossessed God's enemies before [Adonai], (22) and the land has been subdued, at the instance of Adonai, and then you return—you shall be clear before Adonai and before Israel; and this land shall be your holding under Adonai. (23) But if you do not do so, you will have sinned against Adonai; and know that your sin will overtake you. (24) Build towns for your children and sheepfolds for your flocks, but do what you have promised.” (25) The Gadites and the Reubenites answered Moses, “Your servants will do as my lord commands. (26) Our children, our wives, our flocks, and all our other livestock will stay behind in the towns of Gilead; (27) while your servants, all those recruited for war, cross over, at the instance of Adonai, to engage in battle—as my lord orders.”

The Gemara explains: Jerusalem was destroyed on account of Kamtza and bar Kamtza. This is as there was a certain man whose friend was named Kamtza and whose enemy was named bar Kamtza. He once made a large feast and said to his servant: Go bring me my friend Kamtza. The servant went and mistakenly brought him his enemy bar Kamtza. The man who was hosting the feast came and found bar Kamtza sitting at the feast. The host said to bar Kamtza. That man is the enemy [ba’al devava] of that man, that is, you are my enemy. What then do you want here? Arise and leave. Bar Kamtza said to him: Since I have already come, let me stay and I will give you money for whatever I eat and drink. Just do not embarrass me by sending me out. The host said to him: No, you must leave. Bar Kamtza said to him: I will give you money for half of the feast; just do not send me away. The host said to him: No, you must leave. Bar Kamtza then said to him: I will give you money for the entire feast; just let me stay. The host said to him: No, you must leave. Finally, the host took bar Kamtza by his hand, stood him up, and took him out. After having been cast out from the feast, bar Kamtza said to himself: Since the Sages were sitting there and did not protest the actions of the host, although they saw how he humiliated me, learn from it that they were content with what he did. I will therefore go and inform [eikhul kurtza] against them to the king. He went and said to the emperor: The Jews have rebelled against you. The emperor said to him: Who says that this is the case? Bar Kamtza said to him: Go and test them; send them an offering to be brought in honor of the government, and see whether they will sacrifice it. The emperor went and sent with him a choice three-year-old calf. While bar Kamtza was coming with the calf to the Temple, he made a blemish on the calf’s upper lip. And some say he made the blemish on its eyelids, a place where according to us, i.e., halakha, it is a blemish, but according to them, gentile rules for their offerings, it is not a blemish. Therefore, when bar Kamtza brought the animal to the Temple, the priests would not sacrifice it on the altar since it was blemished, but they also could not explain this satisfactorily to the gentile authorities, who did not consider it to be blemished. The blemish notwithstanding, the Sages thought to sacrifice the animal as an offering due to the imperative to maintain peace with the government. Rabbi Zekharya ben Avkolas said to them: If the priests do that, people will say that blemished animals may be sacrificed as offerings on the altar. The Sages said: If we do not sacrifice it, then we must prevent bar Kamtza from reporting this to the emperor. The Sages thought to kill him so that he would not go and speak against them. Rabbi Zekharya said to them: If you kill him, people will say that one who makes a blemish on sacrificial animals is to be killed. As a result, they did nothing, bar Kamtza’s slander was accepted by the authorities, and consequently the war between the Jews and the Romans began. Rabbi Yoḥanan says: The excessive humility of Rabbi Zekharya ben Avkolas destroyed our Temple, burned our Sanctuary, and exiled us from our land.

(4) Hear, O Israel! Adonai is our God, Adonai is One!