Exodus 25:16 in the King James Version
And thou shalt put into the ark the testimony which I shall give thee.
Context
15 The poles shall be in the rings of the ark. They shall not be taken from it.
16 You shall put the covenant which I shall give you into the ark.
17 You shall make a mercy seat of pure gold. Two and a half cubits shall be its length, and a cubit and a half its width.