Leviticus 24:1-3

1Then the Lord spoke to Moses, saying,

2“Command the sons of Israel that they bring to you 1clear oil from beaten olives for the 2light, to make a lamp 3burn continually.

3Outside the veil of the testimony in the tent of meeting, Aaron shall keep it in order from evening to morning before the Lord continually; it shall be a permanent statute throughout your generations.