Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke?
To loose the bands of wickedness - i:e., to dissolve every tie wherewith one has unjustly bound his fellow-men, (Leviticus 25:49, etc.) Servitude, a fraudulent contract, etc.
Undo the heavy burdens - Hebrew, loose the bands of the yoke.
To let the oppressed go free - literally, the broken. The expression, to let go free implies that those broken with the yoke of slavery are meant (Nehemiah 5:10-12; Jeremiah 34:9-11; Jeremiah 34:14; Jeremiah 34:16). Jerome interprets it, broken with poverty; bankrupt.