Exodus 25:12-16

You shall also cast four gold rings for it and fasten them on its four feet; two rings shall be on one side of it, and two rings on the other side of it.

And you shall make poles of acacia wood and overlay them with gold.

You shall put the poles into the rings on the sides of the ark, to carry the ark with them.

The poles shall remain in the rings of the ark; they shall not be removed from it.

You shall put into the ark the testimony which I shall give you.