Verse from John

“Now on the last day, the great day of the feast, Jesus stood and cried out, saying, “If anyone is thirsty, let him come to Me and drink.”

‭‭John‬ ‭7:37‬ ‭

In the law of Moses, God commanded every adult male Jew to come to the temple in Jerusalem to observe three annual harvest festivals or feasts (see Exodus 23:14–17; Deuteronomy 16:1–17): the Feast of Unleavened Bread (Passover [Pesach]), the Feast of Harvest (or Weeks [Shavuot] or Pentecost), and the Feast of Ingathering (or Tabernacles [Sukkoth] or Booths). 

In John 7, Jesus came to the temple to observe the Feast of the Tabernacles (vv. 2, 37). The Jews celebrated this weeklong festival to commemorate God’s provision during their forty-year journey in the wilderness (Leviticus 23:33–44). The lighting of giant menorahs in the temple courtyard reminded them of the pillar of fire that had guided them (Exodus 13:21–22), and a water-pouring ritual reminded them of the water from the rock which quenched their thirst (17:6; Numbers 20:8–11). 

Against this background, Jesus offered “rivers of living water” (John 7:38) and proclaimed, “I am the light of the world” (8:12).

Note: excerpt from ODB