Revelation 21:15-16

And hee that talked with mee, had a golden reede, to measure the citie withall, and the gates thereof, and the wall thereof.

And the citie laie foure square, and the length is as large as the bredth of it, and he measured the citie with the reede, twelue thousande furlongs: and the length, and the bredth, and the height of it are equall.