Revelation 21:13
There are three gates on the east side, three gates on the north side, three gates on the south side and three gates on the west side.
Ezekiel 48:31-34
the gates of the city will be named for the tribes of Israel; there will be three gates to the north: one gate for Reuben, one gate for Judah, and one gate for Levi.
Treasury of Scripture Knowledge
Summary
                            On the east three gates; on the north three gates; on the south three gates; and on the west three gates.                        
                    General references
Bible References
General references
                                        Ezekiel 48:31                                        
                                                            
                        the gates of the city will be named for the tribes of Israel; there will be three gates to the north: one gate for Reuben, one gate for Judah, and one gate for Levi.