Genesis 6:19

And of every living thing of all flesh, two of every sort shalt thou bring into the ark, to keep them alive with thee; they shall be male and female.

Genesis 7:2-3

Of every clean animal thou shalt take to thee seven pairs, the male and his female; but of animals that are not clean, two, the male and his female.

Genesis 7:8-9

Of clean animals and of animals that are not clean and of fowls and of every thing that moves upon the earth,

Genesis 7:15-16

And they went in unto Noah into the ark, two by two of all flesh in which is the spirit of life.

Genesis 8:17

Bring forth with thee every animal that is with thee, of all flesh, both of fowl and of beasts and of every creeping thing that moves upon the earth, that they may breed abundantly in the earth, and be fruitful, and multiply upon the earth.

Psalm 36:6

Thy righteousness is like the mountains of God; thy judgments are a great deep; O LORD, thou dost preserve man and beast.

Treasury of Scripture Knowledge

Summary

And of every living thing of all flesh, two of every sort shalt thou bring into the ark, to keep them alive with thee; they shall be male and female.

Bible References

Two

Genesis 7:2
Of every clean animal thou shalt take to thee seven pairs, the male and his female; but of animals that are not clean, two, the male and his female.
Genesis 8:17
Bring forth with thee every animal that is with thee, of all flesh, both of fowl and of beasts and of every creeping thing that moves upon the earth, that they may breed abundantly in the earth, and be fruitful, and multiply upon the earth.
Psalm 36:6
Thy righteousness is like the mountains of God; thy judgments are a great deep; O LORD, thou dost preserve man and beast.