10 Jesus answered her, “If you knew the gift of God, and who it is that is saying to you, ‘Give me a drink,’ you would have asked him, and he would have given you living water.” 11 The woman said to him, “Sir, you have nothing to draw water with, and the well is deep. Where do you get that living water? 12 Are you greater than our father Jacob? He gave us the well and drank from it himself, as did his sons and his livestock.” 13 Jesus said to her, “Everyone who drinks of this water will be thirsty again, 14 but whoever drinks of the water that I will give him will never be thirsty again. The water that I will give him will become in him a spring of water welling up to eternal life.”
John 4:10-14 (ESV)
37 On the last day of the feast, the great day, Jesus stood up and cried out, “If anyone thirsts, let him come to me and drink. 38 Whoever believes in me, as the Scripture has said, ‘Out of his heart will flow rivers of living water.’” 39 Now this he said about the Spirit, whom those who believed in him were to receive, for as yet the Spirit had not been given, because Jesus was not yet glorified.
John 7:37-39 (ESV)