Or else Peter heard that it was necessary Christ must die, and on the third day rise again, but he saw around him a very remote and solitary place; he supposed therefore that the place had some great protection. For this reason he said, It is good for us to be here. (Exod. 24:15, 2 Kings 1:12.) Moses, too was present, who entered into the cloud. Elias, who on the mount brought down fire from heaven. The Evangelist then, to indicate the confusion of mind in which he utters this, added, Not knowing what he said.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: ubi sup.