Leviticus 24:2-4

2“Order Bnei-Yisrael to bring to you pure olive oil, beaten for the light, to keep a lamp burning continually.

3Outside of the curtain of the Testimony, in the Tent of Meeting, Aaron is to keep it in order from evening to morning before Adonai continually. It is to be a statute forever throughout your generations.

4He is to keep the lamps in order on the pure gold menorah before Adonai continually.