Leviticus 24:5-6

24:5 “You must take choice wheat flour and bake twelve loaves; there must be two tenths of an ephah of flour in each loaf, 24:6 and you must set them in two rows, six in a row, on the ceremonially pure table before the Lord.

Leviticus 24:8

24:8 Each Sabbath day Aaron must arrange it before the Lord continually; this portion is from the Israelites as a perpetual covenant.