Exodus 25:20-22

20The cherubim are to have wings spread out above, covering the mercy seat with their wings, and are to face one another. The faces of the cherubim should be toward the mercy seat.

21Set the mercy seat on top of the ark and put the tablets of the testimony that I will give you into the ark.

22I will meet with you there above the mercy seat, between the two cherubim that are over the ark of the testimony; I will speak with you from there about all that I command you regarding the Israelites.