Why does it say that He gives salvation of kings?
Rashi: This refers to Sela ha'Machlekos. Sha'ul was about to seize David, and a Mal'ach 1 told Sha'ul "quickly, go [to fight Pelishtim, who spread over the land" (Shmuel I, 23:27). Hashem saved Sha'ul from spilling innocent blood, and David from being killed.
Radak: Even though they are kings, they need salvation.
Malbim: I will sing to You for the general salvation that You give to kings, and for the particular salvation that You did for me.
A messenger; some say that if was literally an angel. (PF)
What is the meaning of "ha'Potzeh"?
Refer to 144:7:2:1-2.
Why does it say "David Avdo"?
Malbim: Because he is Avdo, Hashem saves him with His hand.
What is "Cherev Ra'ah"?
Radak: It is Sha'ul's sword. It is called an evil sword, for David had no way to guard from it, for Sha'ul was king and David was from his nation.
