Leviticus 24:3-7

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.

⁶And put them in two lines, six in a line, on the holy table before the Lord.

⁷And on the lines of cakes put clean sweet-smelling spices, for a sign on the bread, an offering made by fire to the Lord.