Augustine of Hippo — as excerpted in the Catena Aurea on John 4:7-12

“(Tract. xv) He who asked to drink, however, out of the woman’s vessel, thirsted for the woman’s faith: Jesus answered and said unto her, If thou knewest the gift of God, or Who it is that saith to thee, Give Me to drink, thou wouldest have asked of Him, and He would have given thee living water.”