'Living Water' in the Bible

Jesus answered and said to her, 'If thou hadst known the gift of God, and who it is who is saying to thee, Give me to drink, thou wouldest have asked him, and he would have given thee living water.'

The woman saith to him, 'Sir, thou hast not even a vessel to draw with, and the well is deep; whence, then, hast thou the living water?

he who is believing in me, according as the Writing said, Rivers out of his belly shall flow of living water;'