Ezekiel 46:12-15

Now when the prince shall prepare a voluntary burnt offering or peace offerings voluntarily unto the LORD, one shall then open him the gate that looketh toward the east, and he shall prepare his burnt offering and his peace offerings, as he did on the sabbath day: then he shall go forth; and after his going forth one shall shut the gate.

Now when the prince shall prepare a voluntary burnt offering, or peace offerings voluntarily unto the Lord, one shall then open him the gate that looketh toward the east ... then he shall go forth; and after his going forth one shall shut the gate. Not only is he to perform official acts of worship on holy days and feasts, but in "voluntary" offerings daily he is to show his individual zeal, surpassing all his people in liberality, and so setting them a princely example. The prince goes forth on the most solemn occasions, not only holy days, but when offering extraordinary sacrifices, through the gate looking toward the east, whereby the God of Israel entered in, because of the prince's close connection with Messiah, whose representative he shall be. Compare Ezekiel 44:2 , notes.