Rev 7:3b-17 chiastic structure
1a) Rev 7:3b-9a, Bondservants of God sealed/ standing before the throne + before the Lamb;
1a) Rev 7:3b-4, Until we have sealed the bondservants of God on their foreheads/ The number sealed: 144,000 out of every tribe of Israel;
central axis) Rev 7:5-8, 12,000 each of Judah, Reuben, Gad, Asher, Naphtali, Manasseh, Simeon, Levi, Issachar, Zebulun, Joseph, Benjamin;
2a) Rev 7:9a, After that: A great innumerable multitude, out of every nation, tribe, people, languages, standing before the throne + before the Lamb;
1b) Rev 7:9b, Dressed in white robes, with palm branches in their hands;
1c) Rev 7:10, They cried out: “Salvation be to our God, who sits on the throne, and to the Lamb!”
central axis) Rev 7:11, All the angels were standing around the throne, the elders, and the four living creatures; and they fell on their faces before His throne, and worshiped God;
2c) Rev 7:12, Saying, “Amen! Blessing, glory, wisdom, thanksgiving, honor, power, might be to our God forever + ever! Amen;”
2b) Rev 7:13-14, These arrayed in white robes came out of the great tribulation/ their robes washed + made white in the blood of the Lamb;
2a) Rev 7:15-17, They are before the throne of God, they serve Him day + night in His temple/ He who sits on the throne + the Lamb shelters + shepherds them.
My book The Revelation of Jesus Christ Revealed, based on these studies but greatly expanded, is now available at Revelation Revealed Online. You may also be interested in reading the Book Extras and joining in on the Discussion.