en_tn_condensed/isa/58/04.md

Yahweh continues speaking to the people of Israel.

fist of wickedness

"wicked fist." This shows to what point they fight--viciously. It is possible that going without food leads them to being irritable to the point of violence.

Is this really the kind of fast that I would want

Yahweh uses a question to scold the people. They act like they are humble before God, but they are hurting other people. AT: "This is not the kind of fast I want" (See: rc://en/ta/man/translate/figs-rquestion)

A day for every man to humble himself, for him to bow down his head like a reed

This means the person is bowing down, but he is not truly humble. (See: rc://en/ta/man/translate/figs-simile)

Do you really call this a fast, a day that pleases Yahweh?

Yahweh uses a question to scold the people. AT: "Surely you do not think this kind of fast pleases me"