Exodus 25:15-17

Young's Literal Translation

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;