וְנָתַתָּ֙ אֶת־הַכַּפֹּ֔רֶת עַ֖ל אֲר֣וֹן הָעֵדֻ֑ת בְּקֹ֖דֶשׁ הַקֳּדָשִֽׁים׃
And thou shalt put the ark-cover upon the ark of the testimony in the most holy place.
Targum Jonathan on Exodus
And thou shalt place the mercy-seat with the kerubaia produced of beaten work for it in the Holy of Holies.