Exodus 25:14-18

And thou shalt put the staves into the rings by the sides of the ark, that the ark may be borne with them.

The staves shall be in the rings of the ark: they shall not be taken from it.

And thou shalt put into the ark the testimony which I shall give thee.

And thou shalt make a mercy seat of pure gold: two cubits and a half shall be the length thereof, and a cubit and a half the breadth thereof.

And thou shalt make two cherubims of gold, of beaten work shalt thou make them, in the two ends of the mercy seat.