John 4:14 → Isaiah 12:3

Jesus' promise of "a fount of water springing up to eternal life" echoes the eschatological celebration of Isa 12:3: "With joy you will draw water from the springs of salvation (yeshua)." Isaiah 12 is a hymn of the new exodus, anticipating the day when God's people will rejoice in his saving presence as they once did at the sea (Exod 15). The connection is structural: both texts link water-giving with salvation as God's eschatological gift to his people. Jesus recontextualizes the Isaianic "springs of salvation" as himself — the giver of living water that becomes in the believer a permanently welling spring (pēgē hydatos hallomenou), in contrast to the stagnant well of Jacob that requires repeated return. The encounter with the Samaritan woman thus dramatizes the arrival of the messianic era Isaiah foretold, with Jesus as the embodiment of the salvation-spring.