John Chrysostom

What then will Judas also sit there? Observe what the law was which God gave by Jeremiah, If I have promised any good, and thou art counted unworthy of it, I will punish you. (Jerem. 18:10.) Therefore speaking to His disciples He did not make a general promise, but added, Ye who have continued with me in my temptations.

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

Having said "woe" to the one betraying Me, and meanwhile having taught them (the disciples) that one must be humble-minded, the Lord, just as He assigns "woe" as the portion of the betrayer, so conversely He says to them: but you are those who have continued with Me in My trials; therefore I also bequeath to you a recompense, that is, I make a covenant with you, so that — just as My Father bequeathed to Me, that is, appointed a Kingdom for Me — you also may eat and drink at My table.

Commentary on Luke ↗

Bede

For not the first effort of patience, but long-continued perseverance, is rewarded with the glory of the heavenly kingdom, for perseverance, (which is called constancy or fortitude of mind,) is, so to say, the pillar and prop of all virtues. The Son of God then conducts those who abide with Him in His temptations to the everlasting kingdom. For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection. (Rom. 6:5.) Hence it follows, And I give to you a kingdom, &c.

Catena Aurea by Aquinas ↗

Bonaventure

Fourth, regarding the reward enticing to humility, he adds: You indeed are those who have remained with me in my trials, through the endurance of tribulation. Such are those of whom it is said in Revelation 7: "These are they who have come out of the great tribulation and have washed their robes and made them white in the blood of the Lamb." And such as these are true friends, because, Proverbs 17, "he who is a friend loves at all times, and a brother is proven in distress"; and therefore Ecclesiasticus 6: "If you possess a friend, …

Commentary on Luke, Chapter 22 ↗