Exodus 27:20-21

Amplified Bible, Classic Edition

²⁰ You shall command the Israelites to provide you with pure oil of crushed olives for the light, to cause it to burn continually [every night].

²¹ In the Tent of Meeting [of God with His people], outside the veil which sets apart the Testimony, Aaron and his sons shall keep it burning from evening to morning before the Lord. It shall be a statute to be observed on behalf of the Israelites throughout their generations.