Exodus 27:20-21

21st Century King James Version

²⁰ “And thou shalt command the children of Israel that they bring thee pure oil of beaten olives for the light to cause the lamp to burn always.

²¹ In the tabernacle of the congregation outside the veil, which is before the Testimony, Aaron and his sons shall tend it from evening to morning before the Lord. It shall be a statute for ever unto their generations on the behalf of the children of Israel.