Exodus 27:20-21

Olive oil for the lamps

20 Command the Israelites to bring you pure oil from fresh olives. You will use this oil to make the lamps give light all the time. 21 Aaron and his sons must make sure that the lamps always give light from evening until morning. The lampstand will be in the Tent of Meeting, outside the curtain that hangs in front of the Covenant Box. The lamps must always give light there, where the Lord is. This will always be a rule for the Israelites, now and in the future.

27:21Tent of Meeting was another name for the Tabernacle.