Hebrews 9:3-5

And inside the second veil was the place which is named the Holy of holies; Having a vessel of gold in it for burning perfumes, and the ark of the agreement, which was covered with gold and which had in it a pot made of gold for the manna, and Aaron's rod which put out buds, and the stones with the writing of the agreement; And over it were the winged ones of glory with their wings covering the mercy-seat; about which it is not possible now to say anything in detail.