God spoke to Moses:
"Order the People of Israel to bring you virgin olive oil for light so that the lamps may be kept burning continually.
Aaron is in charge of keeping these lamps burning in front of the curtain that screens The Testimony in the Tent of Meeting from evening to morning continually before God. This is a perpetual decree down through the generations.
Aaron is responsible for keeping the lamps burning continually on the Lampstand of pure gold before God.
"Take fine flour and bake twelve loaves of bread, using about four quarts of flour to a loaf.
Arrange them in two rows of six each on the Table of pure gold before God.
Along each row spread pure incense, marking the bread as a memorial; it is a gift to God.
Regularly, every Sabbath, this bread is to be set before God, a perpetual covenantal response from Israel.
The bread then goes to Aaron and his sons, who are to eat it in a Holy Place. It is their most holy share from the gifts to God. This is a perpetual decree."