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.)
Which lasted seven days. The first and last days were the most important; In the last day, that great day of the feast, says the Evangelist. Those between were given chiefly to amusements. He did not then make the offer on the first day, or the second, or the third, lest amidst the excitements that were going on, people should let it slip from their minds, He cried out, on account of the great multitude of people present.