There cometh a woman of Samaria to draw water: Jesus saith unto her, “Give Me to drink.”…In the mean while His disciples prayed Him, saying, “Master, eat.” But He said unto them, “I have meat to eat that ye know not of.” – John 4:7,31-32

“I thirst.” – John 19:28

I cannot think that natural thirst was all He felt…”I thirst” meant that His heart was thirsting to save men. This thirst had been on Him from the earliest of His earthly days. “Wist ye not,” said He, while yet a boy, “that I must be about My Father’s business?” Did He not tell His disciples, “I have a baptism to be baptized with, and how am I straitened till it be accomplished?” He thirsted to pluck us from between the jaws of hell, to pay our redemption price, and set us free from the eternal condemnation which hung over us; and when on the cross the work was almost done His thirst was not assuaged, and could not be till He could say, “It is finished.” It is almost done, Thou Christ of God; Thou hast almost saved Thy people; there remaineth but one thing more, that Thou shouldst actually die, and hence Thy strong desire to come to the end and complete Thy labour. Thou wast still straightened till the last pang was felt and the last word spoken to complete to full redemption, and hence Thy cry, “I thirst.”

Christ was always thirsty to save men, and to be loved of men; and we see a type of His life-long desire when, being weary, He sat thus on the well and said to the woman of Samaria, “Give Me to drink.” There was a deeper meaning in His words than she dreamed of, as a verse further down fully proves, when He said to His disciples, “I have meat to eat that ye know not of.” He derived spiritual refreshment from the winning of that women’s heart to Himself. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1409.cfm