'Fountain of Living Waters' in the Bible

For my people have committed two evils: they have forsaken me, the fountain of living waters, and hewed them out cisterns, broken cisterns, that can hold no water.

O Jehovah, the hope of Israel, all that forsake thee shall be put to shame. They that depart from me shall be written in the earth, because they have forsaken Jehovah, the fountain of living waters.