Ambrose of Milan

But still these are but slight examples of the testimony to the Lord. The full assurance of faith is the cross of the Lord, His death and burial. Hence He adds, And blessed is he who shall not be offended in me. For the cross may cause offence, even to the elect. But there is no greater testimony than this of a divine person. For there is nothing which seems to be more surpassing the nature of man than that one should offer Himself for the whole world.

Catena Aurea by Aquinas ↗

Gregory the Dialogist

But the mind of unbelievers suffered grave scandal in him when they saw him dying even after so many miracles. Hence Paul also says: "But we preach Christ crucified, to the Jews indeed a scandal, but to the Gentiles foolishness." For it seemed foolish to men that the author of life should die for mankind; and from this, man took scandal against him, from which he ought rather to have become more indebted. For God is to be honored by men all the more worthily, the more he undertook even unworthy things for mankind. …

Forty Gospel Homilies, Homily 6 ↗

Bede

"And blessed is he who does not take offense at me." He reprimands John's messengers, who did not believe He was the Christ, for their scandal of unbelief, and He explains to John what he had asked, that God brings salvation, and the Lord delivers from death (Psalm 67). For, when so many signs and mighty deeds have been seen, no one could take offense but rather marvel. Yet the mind of the unfaithful bore a great scandal when they saw Him die even after so many miracles. …

On the Gospel of Luke ↗