Leviticus 24:1-5

¹And the Lord said to Moses,

²Give orders to the children of Israel to give you clean olive oil for the light, so that a light may be burning at all times,

³Outside the veil of the ark in the Tent of meeting; let Aaron see that it is burning from evening till morning at all times before the Lord: it is a rule for ever through all your generations.

⁴Let Aaron put the lights in order on the support before the Lord at all times.

⁵And take the best meal and make twelve cakes of it, a fifth part of an ephah in every cake.