Leviticus 24:2-4

Thomson(i) 2 Give orders to the children of Israel, and let them bring the oil, pure expressed oil for light, that a lamp may burn continually, 3 without the veil, in the tabernacle of the testimony. And Aaron and his sons shall keep it burning, from evening till morning, continually, before the Lord. It is an everlasting statute for your generations. 4 You shall keep the lamps burning on the pure candlestick before the Lord, until the morning.