37 On the last day of the feast, the greatest day, Jesus stood up and shouted out, “If anyone is thirsty, let him come to me, and 38 let the one who believes in me drink. Just as the scripture says, ‘From within him will flow rivers of living water.’” 39 (Now he said this about the Spirit, whom those who believed in him were going to receive, for the Spirit had not yet been given because Jesus was not yet glorified.) 40 When they heard these words, some of the crowd began to say, “This really is the Prophet!” 41 Others said, “This is the Christ!” But still others said, “No, for the Christ doesn’t come from Galilee, does he?
Mishnah Sukkah 4:8Mishnah
This mishna elaborates upon the first mishna in this chapter. The obligation to recite hallel and the mitzva of rejoicing on the Festival by sacrificing and eating the meat of peace-offerings are always for eight days. The mishna explains: How so? This teaches that a person is obligated in hallel, and in the mitzva of rejoicing, and in reverence for the last day of the Festival like he is for all the other days of the Festival. The mitzva of sukka is seven days. How does one fulfill this obligation for seven full days? When one finished eating on the seventh day, he should not dismantle his sukka immediately, because the obligation continues until the end of the day. However, he takes the vessels down from the sukka into the house from minḥa time and onward in deference to the last day of the Festival, when he will require the vessels in the house. With regard to the rite of water libation performed in the Temple during the Festival, how was it performed? One would fill a golden jug with a capacity of three log with water from the Siloam pool. When those who went to bring the water reached the Gate of the Water, so called because the water for the libation was brought through this gate leading to the Temple courtyard, they sounded a tekia, sounded a terua, and sounded another tekia as an expression of joy.
Notes and References
"... In John, Jesus alludes to the halakic regulations that allow for circumcision on the Sabbath; is aware of the custom of using stone jars for the waters of purification; knows the Palestinian manna traditions of the Jewish haggadah and the significance of the last day of the Feast of Tabernacles and the water poured in front of the altar. The designations used for Jesus reflect the categories that come from the Scriptures and the world of first-century Judaism..."
Thompson, Marianne M. "Word of God, Messiah of Israel, Savior of the World" in Gaventa, Beverly Roberts, and Richard B. Hays, ed. Seeking the Identity of Jesus: A Pilgrimage (p. 170) William B. Eerdmans Publishing Company, 2008
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