Exodus 27:20-21
Exodus 27:20-21 MSG
“Now, order the Israelites to bring you pure, clear olive oil for light so that the lamps can be kept burning. In the Tent of Meeting, the area outside the curtain that veils The Testimony, Aaron and his sons will keep this light burning from evening until morning before GOD. This is to be a permanent practice down through the generations for Israelites.”