This oppressed man

David describes himself as an oppressed man. AT: "I was oppressed and" (See: rc://en/ta/man/translate/figs-123person)

Yahweh heard him

Here "heard" means that Yahweh helped him. AT: "Yahweh heard me" or "Yahweh helped him" (See: rc://en/ta/man/translate/figs-idiom)