Why is "Sarei ha'Me'os" written with a Yud, and pronounced without a Yud?
Radak: The Yud hints to the Hei at the end of the root, which is omitted. The Hei in Me'ah is for the feminine. It is written like this in this entire Parshah.
Who were "Sarei ha'Me'os"?
Radak: They were Kohanim and Leviyim (appointed over Kohanim and Leviyim), for there were many of them. David appointed 4,000 gatekeepers and 4,000 singers [with instruments - Metzudas David Divrei ha'Yamim I, 23:5].
What is the meaning of "la'Kari vela'Ratzim"?
Rashi: It is Sarei ha'Me'os for the Giborim and Sarei ha'Me'os for the Ratzim 1 . Malbim - Kari is like "ha'Kereisi veha'Pleisi" (Shmuel II, 8:18), who are Giborim.
Malbim: He took Sarei ha'Me'os, and the Kari and the Ratzim. Malbim (19, from Divrei ha'Yamim II, 23:20) - Kari are the Adirim (officers); Ratzim are the rulers.
Radak (Shmuel I, 22:17): These are people who run on foot in front of the king.
Why does it say "la'Kari" (singular)?
Rashi: It is a collective noun for the Giborim under a noble's charge.
Radak: The final Mem is omitted. This is like "ha'Roded Ami Tachtai" (Tehilim 144:2); this is like Amim.
Why did he call to the Sarim and the Ratzim?
Radak: He called to the Sarim to take counsel with them, and to the Ratzim to prepare them to guard the king.
What Bris did he make with them?
Rashi: They will help him to make the king's son the king.
