Cyril of Alexandria — as excerpted in the Catena Aurea on Luke 13:31-35

“Or else the discourse seems to change here, and not to refer so much to the character of Herod as some think, as to the lies of the Pharisees. For He almost represents the Pharisees themselves to be standing near, when He said, Go tell this fox, as it is in the Greek. Therefore he commanded them to say that which might rouse the multitude of Pharisees. Behold, said He, I cast out devils, and I do cures to day and to morrow, and on the third day I shall be perfected. He promises to do what was displeasing to the Jews, namely, to command the evil spirits, and deliver the sick from disease, until in His own person He should undergo the suffering of the cross. But because the Pharisees thought that He who was the Lord of hosts, feared the hand of Herod. He refutes this, saying, Nevertheless I must walk to day and to morrow, and the day following. When He says must, He by no means implies a necessity imposed upon Him, but rather that He walked where He liked according to the inclination of His will, until He should come to the end of the dreadful cross, the time of which Christ shews to be now drawing near, when He says, To day and to morrow.”