Exodus 25:16
And place inside the ark the Testimony, which I will give you.
What it says
The Testimony that God will give is to be placed inside the ark.
What it is doing
It gives the ark its defining contents and purpose.
In context
10And they are to construct an ark of acacia wood, two and a half cubits long, a cubit and a half wide, and a cubit and a half high. 11Overlay it with pure gold both inside and out, and make a gold molding around it. 12Cast four gold rings for it and fasten them to its four feet, two rings on one side and two on the other. 13And make poles of acacia wood and overlay them with gold. 14Insert the poles into the rings on the sides of the ark, in order to carry it. 15The poles are to remain in the rings of the ark; they must not be removed. 16And place inside the ark the Testimony, which I will give you.