Cross reference
Exodus 39:35
35 the ark of the testimony and its staves, and the mercy-seat;
Exodus 25:17
17 `And thou hast made a mercy-seat of pure gold, two cubits and a half its length, and a cubit and a half its breadth;
Hebrews 9:5
5 and over it cherubim of the glory, overshadowing the mercy-seat, concerning which we are not now to speak particularly.
Hebrews 9:8
8 the Holy Spirit this evidencing that not yet hath been manifested the way of the holy `places', the first tabernacle having yet a standing;