Theophylact of Ohrid

And whoever is on the housetop, let him not return to his house for anything: he should be glad even if he escapes naked. And whoever already stands on the height, let him not come down from it. For when any passionate thought arises in us, then we must through confession hasten to the height of virtue and not descend from that height. And let the one doing good not turn back to take up his former conscience — the old garment which he had stripped off.

Commentary on Mark ↗

Bede

Then let him who is on the house-top, that is, whose mind rises above carnal deeds, and who lives spiritually, as it were in the free air, not come down to the base acts of his former conversation, nor seek again those things which he had left, the desires of the world or the flesh. For our house either means this world, or that in which we live, our own flesh.

Catena Aurea by Aquinas ↗

Glossa Ordinaria

It goes on, And let him that is on the housetop not go down into the house, neither enter therein, to take any thing out of his house; for it is a desirable thing to be saved even naked from such a destruction.

Catena Aurea by Aquinas ↗