Genesis 8:17
ESV - 17 Bring out with you every living thing that is with you of all flesh - birds and animals and every creeping thing that creeps on the earth - that they may swarm on the earth, and be fruitful and multiply on the earth.
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Noah had seven of every clean animal and a pair of every unclean animal. "Take with you seven pairs of every kind of clean animal, a male and its mate, and one pair of every kind of unclean animal, a male and its mate" Gen 7:2