John Chrysostom — as excerpted in the Catena Aurea on Matthew 24:36-41

“That you may perceive that it is not owing to ignorance that He is silent of the day and hour of the judgment, He brings forward another token, As it the as in we days of Noe, so shall the coming of the Son of Man be. By this He means that He shall come sudden and unlooked for, and while men are taking their pleasure; of which Paul also speaks, When they shall say, Peace and safety, then sudden destruction cometh upon them. (1 Thess. 5:3.)”