15 And the one speaking with me had a golden measuring reed, so that he could measure the city, and its gates, and its wall.
Revelation 21:15 Cross References - BLB
Revelation 11:1-2
1 And a measuring rod like a staff was given to me, saying, “Rise and measure the temple of God, and the altar, and those worshiping in it.
2 And leave out the courtyard outside the temple, and do not measure it, because it has been given up to the nations, and they will trample upon the holy city forty and two months.