Ezekiel 46:12
The prince may choose to give a freewill offering to the LORD. It may be a burnt offering or a peace offering. Then the gate facing east must be opened for him. He must offer his burnt offering or peace offering just as he does on the Sabbath day. Then he must go out. After he goes out, the gate must be shut.
Ezekiel 46:12, Readable English Bible (READ)