Babylonian Talmud, Tractate Sukkah 51a and 51b

Mishnah: He who has not seen the rejoicing at the place of the water-drawing has never seen rejoicing in his life. At the conclusion of the first festival day of Tabernacles they descended to the court of the women where they had made a great enactment. There were there golden candlesticks with four golden bowls on the top of each of them and four ladders to each, and four youths drawn from the priestly stock in whose hands were held jars of oil containing one hundred and twenty log which they poured into the bowls. From the worn-out drawers and girdles of the priests they made wicks and with them they kindled the lamps; and there was not a courtyard in Jerusalem that was not illumined by the light of the place of the water-drawing. Men of piety and good deeds used to dance before them with lighted torches in their hands, and sing songs and praises. And Levites without number with harps, lyres, cymbals and trumpets and other musical instruments were there upon the fifteen steps leading down from the court of the Israelites to the court of the women, corresponding to the fifteen songs of ascents in the Psalms…