27:21 lau'Adh-dhiban-nahuu 'Adhaaban shadiydan aw la adhbaHan-nahuu aw la ya'tiyan-niy bi sulTaanim mubiyn

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Ahmed Raza Khan: Mohammed Aqib Qadri:
"I will indeed punish him severely or slay him, or he must bring to me some clear evidence."

Yusuf Ali:
"I will certainly punish him with a severe penalty, or execute him, unless he bring me a clear reason (for absence)."

Pickthal:
I verily will punish him with hard punishment or I verily will slay him, or he verily shall bring me a plain excuse.