'Ark of the Testimony' in the Bible

And Aaron came, and his sons, in the removing of the camp, and they took down the vail of the covering, and they covered with it the ark of the testimony.

And in Moses going in to the tent of appointment to speak to him, and he will hear the voice speaking to him from above the cover upon the ark of the testimony, from between the two cherubs: and he will speak to him.