God instructed Moses on every detail in preparation for the tabernacle’s services. Priests were to have priestly garments, but the high priest wore a special ephod, which contained the names of the sons of Israel. He also wore a breastplate, which contained the Urim and Thummim and was to be on his heart (Exodus 28). All priests were to be consecrated (Exodus 29). Other items to be carefully prepared were the altar of incense, the basin for washing, the anointing oil, and the incense (Exodus 30).