20. they—"the rich" and "princes" who offend God.
the people—namely, of the guilty princes: guilty also themselves.
at midnight—image from a night attack of an enemy on a camp, which becomes an easy prey (Ex 12:29, 30).
without hand—without visible agency, by the mere word of God (so Job 20:26; Zec 4:6; Da 2:34).