In Jesus’ day, the last day of the Feast of Tabernacles began at the Pool of Siloam, with a joyful musical procession called Simhat Beit HaShoevah or The Rejoicing of the Water-Drawing.
During the ceremony, a designated priest, surrounded by jubilant worshippers, would draw water from the Pool of Siloam and carry it in a golden pitcher up the hill to the Temple altar. A blast of trumpets would announce his arrival. The high priest would then pour the Siloam water into one silver basin while wine was poured into another. To the accompaniment of flutes, the priests would sing “Hallelujah” (the Hallel). The celebration was based upon Isaiah 12: 3, “With joy ye shall draw water out of the wells of salvation.”
Remember, it is during the Feast of Tabernacles that Jesus, in the Temple courtyard, spoke of the promise of living water. Jesus may have pointed to the golden pitcher as he cried out, “If any man is thirsty, let him come to Me and drink." (John 7: 37)This is the same pool where a man who was blind from birth was told by Jesus to go wash in. “Go, wash in the Pool of Siloam,” Jesus said. The man did as he was told, and he was able to see.
On the last day of Tabernacles, our eyes will be open and we shall finally see Him as He is. We have all been blind from birth, unable to see our precious Lord and Savior with our eyes. But on that day, He shall open our blind eyes and we shall see Him as He is. 1 John 3:2 "Dear friends, now we are children of God, and what we will be has not yet been made known. But we know that when He appears, we shall be like Him, for we shall see Him as He is."