Theophylact of Ohrid
Catena Aurea · Johannesevangelium 4
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. Therefore said the disciples one to another, Hath any man brought him ought to eat? Jesus saith unto them, My meat is to do the will of him that sent me, and to finish his work.
He finished the work of God, i. e. man, He, the Son of God, finished it by exhibiting our nature in Himself without sin, perfect and uncorrupt. He finished also the work of God, i. e. the Law, (Rom. 10:4) (for Christ is the end of the Law,) by abolishing it, when every thing in it had been fulfilled, and changing a carnal into a spiritual worship.