Exodus 26:33-34

26:33 You are to hang this curtain under the clasps and bring the ark of the testimony in there behind the curtain. The curtain will make a division for you between the Holy Place and the Most Holy Place. 26:34 You are to put the atonement lid on the ark of the testimony in the Most Holy Place.

Hebrews 9:3-8

9:3 And after the second curtain there was a tent called the holy of holies. 9:4 It contained the golden altar of incense and the ark of the covenant covered entirely with gold. In this ark were the golden urn containing the manna, Aaron’s rod that budded, and the stone tablets of the covenant. 9:5 And above the ark were the cherubim of glory overshadowing the mercy seat. Now is not the time to speak of these things in detail. 9:6 So with these things prepared like this, the priests enter continually into the outer tent as they perform their duties. 9:7 But only the high priest enters once a year into the inner tent, and not without blood that he offers for himself and for the sins of the people committed in ignorance. 9:8 The Holy Spirit is making clear that the way into the holy place had not yet appeared as long as the old tabernacle was standing.