Genesis 7:7-9

Young's Literal Translation

⁷ And Noah goeth in, and his sons, and his wife, and his sons' wives with him, unto the ark, from the presence of the waters of the deluge;

⁸ of the clean beasts and of the beasts that [are] not clean, and of the fowl, and of every thing that is creeping upon the ground,

⁹ two by two they have come in unto Noah, unto the ark, a male and a female, as God hath commanded Noah.