Leviticus 24:1-4

The Lord spoke to Moses: “Command the Israelites to bring to you pure oil of beaten olives for the light, to make a lamp burn continually. Outside the veil-canopy of the congregation in the Meeting Tent Aaron must arrange it from evening until morning before the Lord continually. This is a perpetual statute throughout your generations. On the ceremonially pure lampstand he must arrange the lamps before the Lord continually.