EXO 29:42

42 it is a sacrifice to the Lord by everlasting offering into your generations, at the door of the tabernacle of witnessing before the Lord, where I shall ordain that I speak to thee; (it is a sacrifice to the Lord, yea, an offering that shall be made by all your generations to come, at the entrance to the Tabernacle of the Witnessing before the Lord, where I have ordained that I shall speak to thee;)