Adam Clarke's Commentary on the Bible - John 19:28
I thirst - The scripture that referred to his drinking the vinegar is Psalm 69:21 . The fatigue which he had undergone, the grief he had felt, the heat of the day, and the loss of blood, were the natural causes of this thirst. This he would have borne without complaint; but he wished to give them the fullest proof of his being the Messiah, by distinctly marking how every thing relative to the Messiah, which had been written in the prophets, had its complete fulfillment in him. read more
John Gills Exposition of the Bible Commentary - John 19:28
After this ,.... After he had committed his mother to the care of John, which was about the sixth hour, before the darkness came over the land: and three hours after this was the following circumstance, which was not without the previous knowledge of Christ: Jesus knowing that all things were now accomplished ; or just upon being accomplished, were as good as finished; and as they were to be, would be in a very short time; even all things relating to his sufferings, and the circumstances... read more