Ambrose of Milan

Now let us inquire by what order they entered into the ark, how long they remained there, and in what order they went out; how in the first instance Noah entered, and after him his sons; then his wife, and the wives of his sons; and when they went out, in what order they went forth. For it is written: 'Noah went forth, and his wife, and his sons, and the wives of his sons' (Genesis 8:18). And the letter indeed signifies, in the entrance, the abstinence from generation, and in the going out, the use of generation. …

On Noah and the Ark, 21.76 ↗