Exodus 25:16 in the World English Bible
You shall put the covenant which I shall give you into the ark.
Context
15 The staves shall be in the rings of the ark: they shall not be taken from it.
16 And thou shalt put into the ark the testimony which I shall give thee.
17 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.