Hebrews 9:3-5 ESV
Behind the second curtain was a second section called the Most Holy Place, having the golden altar of incense and the ark of the covenant covered on all sides with gold, in which was a golden urn holding the manna, and Aaron’s staff that budded, and the tablets of the covenant. Above it were the cherubim of glory overshadowing the mercy seat. Of these things we cannot now speak in detail.
ESV: English Standard Version 2016