The word(s) "authority" appears 56 time(s) in 54 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) "For over My servants no authority shalt thou have, except such as put themselves in the wrong and follow thee."

(22) No authority has he over those who believe and put their trust in their Lord.

(23) His authority is over those only, who take him as patron and who join partners with Allah.

(24) Nor take life - which Allah has made sacred - except for just cause. And if anyone is slain wrongfully, we have given his heir authority (to demand qisas or to forgive): but let him not exceed bounds in the matter of taking life; for he is helped (by the Law).

(25) "As for My servants, no authority shalt thou have over them:" Enough is thy Lord for a Disposer of affairs.

(26) Say: "O my Lord! Let my entry be by the Gate of Truth and Honour, and likewise my exit by the Gate of Truth and Honour; and grant me from Thy Presence an authority to aid (me)."

(27) "These our people have taken for worship gods other than Him: why do they not bring forward an authority clear (and convincing) for what they do? Who doth more wrong than such as invent a falsehood against Allah?

(28) Until, when he reached the setting of the sun, he found it set in a spring of murky water: Near it he found a People: We said: "O Zul-qarnain! (thou hast authority,) either to punish them, or to treat them with kindness."

(29) (Allah) Most Gracious is firmly established on the throne (of authority).

(30) Yet they worship, besides Allah, things for which no authority has been sent down to them, and of which they have (really) no knowledge: for those that do wrong there is no helper.