Genesis 6:19

and of all that liveth, of all flesh, two of every sort thou dost bring in unto the ark, to keep alive with thee; male and female are they.

Genesis 7:2-3

of all the clean beasts thou dost take to thee seven pairs, a male and its female; and of the beasts which are not clean two, a male and its female;

Genesis 7:8-9

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,

Genesis 7:15-16

And they come in unto Noah, unto the ark, two by two of all the flesh in which is a living spirit;

Genesis 8:17

and they have teemed in the earth, and been fruitful, and have multiplied on the earth.'

Psalm 36:6

Thy righteousness is as mountains of God, Thy judgments are a great deep. Man and beast Thou savest, O Jehovah.

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 all the clean beasts thou dost take to thee seven pairs, a male and its female; and of the beasts which are not clean two, a male and its female;
Genesis 8:17
and they have teemed in the earth, and been fruitful, and have multiplied on the earth.'
Psalm 36:6
Thy righteousness is as mountains of God, Thy judgments are a great deep. Man and beast Thou savest, O Jehovah.