Revelation 21:12-13New King James Version (NKJV)

¹² Also she had a great and high wall with twelve gates, and twelve angels at the gates, and names written on them, which are the names of the twelve tribes of the children of Israel: ¹³ three gates on the east, three gates on the north, three gates on the south, and three gates on the west.

Read more about the twelve tribes of Israel – twelve son of Jacob