Moses
Genesis 7:2ESV·traditional attribution

Take with you seven pairs of all clean animals, the male and his mate, and a pair of the animals that are not clean, the male and his mate,

John Calvin Reformed @genevareformer

2. Of every clean beast . He again repeats what he had before said concerning animals, and not without occasion. For there was no little difficulty in collecting from woods, mountains, and caves, so great a multitude of wild beasts, many species of which were perhaps altogether unknown; and there was, in most of them, the same ferocity which we now perceive.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A gracious invitation of Noah and his family into a place of safety, now that the flood of waters was coming, Gen 7:1. 1. The call itself is very kind, like that of a tender father to his children, to come in doors, when he sees night or a storm coming: Come thou, and all thy house, that small family that thou hast, into the ark.

Commenting on Genesis 7:1-4

John Gill Reformed Baptist @doctorgill

Of every clean beast thou shalt take to thee by sevens,.... From hence it appears, that the distinction of clean and unclean beasts, at least for sacrifice, if not for food, was known before the flood, and so before the law of Moses; though some think this is said by anticipation, and as providing a large stock of such creatures for the propagation of their...