Leviticus 8:10

“You shall put them on Aaron your brother and on his sons with him; and you shall anoint them and ordain them and set them apart as holy, that they may minister to Me as priests.

“Now this is what you shall do to them to set them apart as holy to minister as priests to Me: take one bull from the herd and two rams without blemish,

“You shall gird them with sashes, Aaron and his sons, and bind caps on them, and they shall have the priesthood by a perpetual statute. So you shall ordain Aaron and his sons.

“And you shall make of these a holy anointing oil, a perfume mixture, the work of a perfumer; it shall be a holy anointing oil.

“And with it you shall anoint the tent of meeting and the ark of the testimony,

“Then you shall take the anointing oil and anoint the tabernacle and all that is in it and set it apart as holy and all its furnishings; and it shall be holy.

Moses and Aaron were among His priests, And Samuel was among those who called on His name; They would call upon Yahweh and He would answer them.