Cross reference
Revelation 21:17
17 Its wall is one hundred forty-four cubits,{144 cubits is about 65.8 meters or 216 feet} by the measure of a man, that is, of an angel.
Deuteronomy 3:11
11 (For only Og king of Bashan remained of the remnant of the Rephaim; behold, his bedstead was a bedstead of iron; isn't it in Rabbah of the children of Ammon? nine cubits was the length of it, and four cubits the breadth of it, after the cubit of a man.)
Revelation 7:4
4 I heard the number of those who were sealed, one hundred forty-four thousand, sealed out of every tribe of the children of Israel:
Revelation 13:18
18 Here is wisdom. He who has understanding, let him calculate the number of the beast, for it is the number of a man. His number is six hundred sixty-six.
Revelation 14:3
3 They sing a new song before the throne, and before the four living creatures and the elders. No one could learn the song except the one hundred forty-four thousand, those who had been redeemed out of the earth.
Revelation 21:9
9 One of the seven angels who had the seven bowls, who were loaded with the seven last plagues came, and he spoke with me, saying, "Come here. I will show you the wife, the Lamb's bride."