God Be Merciful To Us
The mercy of the Lord endures forever.
The Lord sits on the mercy seat that covers the testimony of His Word between the cherubim.
The mercy of God is part of His throne and it is who He is.
You shall put the mercy seat on top of the ark, and in the ark you shall put the Testimony that I will give you. And there I will meet with you, and I will speak with you from above the mercy seat, from between the two cherubim which are on the ark of the Testimony, about everything which I will give you in commandment to the children of Israel. (Exodus 25:21-22)