In the desert camp, Moses listened as God gave careful instructions for the Mishkan. First, the Israelites were to bring clear oil from beaten olives so the lamps could be kept softly burning every night. Aaron and his sons would set the lamps in the Tent of Meeting, outside the curtain near the Ark of the Pact, and keep them burning from evening until morning.
Then God told Moses to bring Aaron forward with his sons, Nadab, Abihu, Eleazar, and Ithamar, to serve as priests. Skilled workers, gifted with special ability, would make sacred clothing for dignity and adornment: a breastpiece, an ephod, a robe, a fringed tunic, a headdress, and a sash. They would use gold, blue, purple, and crimson yarns, and fine linen, so Aaron and his sons could serve in a way that honored the holy place.