What does Revelation 7:5 mean?
From the tribe of Judah, 12,000 are sealed. Judah is mentioned first, perhaps because Jesus came from this tribe. When Jacob blessed his sons, he said of Judah: "Judah, your brothers shall praise you; your hand shall be on the neck of your enemies; your father's sons shall bow down before you. Judah is a lion's cub…The scepter shall not depart from Judah, nor the ruler's staff from between his feet, until tribute comes to him; and to him shall be the obedience of the peoples" (Genesis 49:8–10). Jesus is identified in Revelation 5:5 as "the Lion of the tribe of Judah," and "the root of David." He prevailed to take the scroll from God's right hand and to open the seals. At the end of the tribulation Jesus will devour His enemies like a lion and rule the nations from the throne of David. Isaiah 9:7 prophesies that Jesus, the virgin-born Messiah, will sit on the throne of David and govern with justice and righteousness.From the tribe of Reuben, 12,000 are sealed. When Jacob blessed his son Reuben, he called him his firstborn, "preeminent in dignity and preeminent in power" (Genesis 49:3). However, Jacob also described Reuben as "unstable as water" and predicted that he would not have preeminence because he had defiled Jacob's bed (Genesis 49:4). As the firstborn, Reuben was entitled to a double portion of his father's inheritance and leadership, but he forfeited those privileges by committing adultery with Jacob's concubine, Bilhah (Genesis 35:22). This sad event happened after Rachel died and was buried on the way to Ephrath.
When Joseph's brothers lifted him out of the pit where they had thrown him, they sold him to certain Ishmaelites who took him to Egypt. Reuben was not present when the brothers sold Joseph, but when he returned and learned what they had done, he was remorseful. So, Reuben was unstable emotionally. Judges 5:15–16 alludes to the tribe of Reuben's indecisiveness. But by God's grace the tribe of Reuben will serve God effectively in the tribulation.
The tribe of Gad is also identified as receiving God's seal. The number of those sealed is given as 12,000. Jacob predicted that Gad would be raided and in return would raid (Genesis 49:19). Gad was one of the tribes that settled east of the Jordan River, where raids were common. This tribe, the Reubenites, and the half tribe of Manasseh included 44,760 valiant warriors (1 Chronicles 5:18). In the tribulation period, the Gadites will triumph over persecution by faith in the Lord.