What is the meaning of "Lehashkit Lo mi'Ymei Ra"?
Rashi: The afflictions quiet for them days of judgment in Gehinom.
Radak: He protects [the Tzadik] from the Rasha during the evil days of the Rasha, while He digs a pit for the Rasha. "Ad"
Malbim: Through temporary afflictions [in this world], he is saved from days of evil - in death.
What is the meaning of "Ad Yikareh la'Rasha Shachas"?
Rashi: Until he will see 1 that [Hashem] digs a pit for the Rasha.
Radak: He protects [the Tzadik] while He digs a pit for the Rasha. "Ad" is like b'Od; the same applies to "Ad Zeh Medaber" (Iyov 1:18).
Metzudas David: Only when he has relief, he will heed to notice the downfall of his enemy.