Exodus 25:18

15 in the rings of the ark are the staves, they are not turned aside from it;

16 and thou hast put unto the ark the testimony which I give unto thee.

17 `And thou hast made a mercy-seat of pure gold, two cubits and a half its length, and a cubit and a half its breadth;

18 and thou hast made two cherubs of gold, beaten work dost thou make them, at the two ends of the mercy-seat;

19 and make thou one cherub at the end on this side, and one cherub at the end on that; at the mercy-seat ye do make the cherubs on its two ends.

20 `And the cherubs have been spreading out wings on high, covering the mercy-seat over with their wings, and their faces [are] one towards another -- towards the mercy-seat are the faces of the cherubs.

21 `And thou hast put the mercy-seat on the ark above, and unto the ark thou dost put the testimony which I give unto thee;