Exodus

And there I will meet with thee, and I will commune with thee from above the mercy seat, from between the two cherubims which are upon the ark of the testimony, of all things which I will give thee in commandment unto the children of Israel.

As the Lord commanded Moses, so Aaron laid it up before the Testimony, to be kept.

And the Lord said unto Moses, Speak unto Aaron thy brother, that he come not at all times into the holy place within the vail before the mercy seat, which is upon the ark; that he die not: for I will appear in the cloud upon the mercy seat.

And thou shalt put it before the vail that is by the ark of the testimony, before the mercy seat that is over the testimony, where I will meet with thee.

This shall be a continual burnt offering throughout your generations at the door of the tabernacle of the congregation before the Lord: where I will meet you, to speak there unto thee.