loose ... bands of wickedness - that is, to dissolve every tie wherewith one has unjustly bound his fellow men (Lev 25:49, etc.). Servitude, a fraudulent contract, etc.
undo ... heavy burdens - Hebrew, “loose the bands of the yoke.”
oppressed - literally, “the broken.” The expression, “to let go free,” implies that those “broken” with the yoke of slavery, are meant (Neh 5:10-12; Jer 34:9-11, Jer 34:14, Jer 34:16). Jerome interprets it, broken with poverty; bankrupt.