Ezekiel 40:10

40:10 There were three alcoves on each side of the east gate; the three had the same measurement, and the jambs on either side had the same measurement. ¹ 

Ezekiel 48:32-34

48:32 On the east side, one and one-half miles in length, there will be three gates: one gate for Joseph, one gate for Benjamin, and one gate for Dan. 48:33 On the south side, one and one-half miles by measure, there will be three gates: one gate for Simeon, one gate for Issachar, and one gate for Zebulun. 48:34 On the west side, one and one-half miles in length, there will be three gates: one gate for Gad, one gate for Asher, and one gate for Naphtali.

[40:10]  ¹ sn The three alcoves are parallel to the city gates found at Megiddo, Hazor, and Gezer.