Ezekiel 46:12

MLV(i) 12 And when the ruler will prepare a free-will offering, a burnt offering or peace offerings as a free-will offering to Jehovah, a man will open for him the gate that looks toward the east. And he will prepare his burnt offering and his peace offerings, as he does on the Sabbath day. Then he will go forth and after his going forth a man will shut the gate.