6. thou—who dost wish to be a true descendant of Jacob.
to THY God—who is therefore bound by covenant to hear thy prayers.
keep mercy and judgment—(Mic 6:8). These two include the second-table commandments, duty towards one's neighbor, the most visible test of the sincerity on one's repentance.
wait on thy God—alone, not on thy idols. Including all the duties of the first table (Ps 37:3, 5, 7; 40:1).