Oil for the Perpetual Lamp

Exodus 27:20-21

And you are to command the Israelites to bring you pure oil of pressed olives for the light, to keep the lamps burning continually.

In the Tent of Meeting, outside the veil that is in front of the Testimony, Aaron and his sons are to tend the lamps before the LORD from evening until morning. This is to be a permanent statute for the Israelites for the generations to come.