Genesis 7:9

There went in two and two unto Noah into the ark
Of themselves, as Jarchi and Aben Ezra, being impressed with an instinct from God so to do; or by the ministry of angels, as observed (See Gill on Genesis 6:20) there were two of a sort, and some think four: the male and the female;
and of some seven, or seven pairs, as before observed: as God commanded Noah;
which respects his own and his family's entrance and the creatures; both were commanded by God, and attended to by Noah, who was obedient in all things.