Revelation 21:17
And he measured its wall [and found it to be] two hundred and sixteen feet [high], according to human measurements which the angel was using.
Revelation 7:4
Then I heard the number of those who were sealed. [It was] one hundred forty-four thousand [in all] from every tribe of the Israelites [Note: This could refer to Christians of Jewish descent].
Revelation 13:18
This calls for wisdom; the person who has understanding should calculate the number of the beast, for it is the number of a person. And his number is six hundred and sixty-six.
Revelation 14:3
And they [i.e., the 144,000] were singing a new song in front of God's throne, and in front of the four living beings and the [twenty-four] elders. No one could learn [to sing] this song except the one hundred and forty-four thousand [See 7:4,9] who had been purchased from the earth.
Revelation 21:9
Then one of the seven angels who held the seven bowls full of the seven last plagues [i.e., judgments, See 15:1], came and spoke to me, saying, "Come here, [and] I will show you the bride, the Lamb's wife."