1)
What does this Mizmor discuss?
1.
Rashi: Refer to 62:1:2:2.
2.
Radak: It is about Galus.
3.
Malbim: This Mizmor is divided into three - (a) his enemies who plot evil against him; (b) his Nefesh, which trusts in and is strengthened in Hashem; (c) rebuke, that Elokim judges in the land.
2)
What is "Yedusun"?
1.
Rashi: It is a musical instrument.
2.
Rashi (citing Midrash Agadah): It is about the Dasos (edicts), Dinin (judgments) and decrees against Yisrael from their enemies.
3.
Radak: It is the name of a singer; David gave this Mizmor to him to sing. "Al" is like El, e.g. "va'Tispalel Al Hashem" (Shmuel I, 1:10) is like El Hashem.