John Chrysostom
Catena Aurea · Johannesevangelium 7
In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink. He that believeth on me, as the Scripture hath said, out of his belly shall flow rivers of living water. (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
(Hom. li. 1) He says, rivers, not river, to shew the copious and overflowing power of grace: and living water, i. e. always moving; for when the grace of the Spirit has entered into and settled in the mind, it flows freer than any fountain, and neither fails, nor empties, nor stagnates. The wisdom of Stephen, the tongue of Peter, the strength of Paul, are evidences of this. Nothing hindered them; but, like impetuous torrents, they went on, carrying every thing along with them.