Isa 58:5

58:5 fast that I choose. See 1:10–15; Amos 5:21–23; Mic. 6:7, 8.

bow down . . . sackcloth and ashes. Conventional acts of mourning ceremonies that accompany fasting (Joel 1:13, 14). God looks for expressions of inner humility and brokenness before Him, rather than devotion to rituals (Matt. 6:16).