These are the numbers of armed warriors who joined David at Hebron. They were all eager to see David become king instead of Saul, just as the had promised.
From the tribe of Judah, there were 6,800 warriors armed with shields and spears.
From the tribe of Simeon, there were 7,100 brave warriors.
From the tribe of Levi, there were 4,600 warriors.
This included Jehoiada, leader of the family of Aaron, who had 3,700 under his command.