The word(s) "chief" appears 83 time(s) in 77 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) Said the chiefs of Pharaoh's people: "Wilt thou leave Moses and his people, to spread mischief in the land, and to abandon thee and thy gods?" He said: "Their male children will we slay; (only) their females will we save alive; and we have over them (power) irresistible."

(22) We appointed for Moses thirty nights, and completed (the period) with ten (more): thus was completed the term (of communion) with his Lord, forty nights. And Moses had charged his brother Aaron (before he went up): "Act for me amongst my people: Do right, and follow not the way of those who do mischief."

(23) The Unbelievers are protectors, one of another: Unless ye do this, (protect each other), there would be tumult and oppression on earth, and great mischief.

(24) But if they violate their oaths after their covenant, and taunt you for your Faith,- fight ye the chiefs of Unfaith: for their oaths are nothing to them: that thus they may be restrained.

(25) And there are those who put up a mosque by way of mischief and infidelity - to disunite the Believers - and in preparation for one who warred against Allah and His Messenger aforetime. They will indeed swear that their intention is nothing but good; But Allah doth declare that they are certainly liars.

(26) Of them there are some who believe therein, and some who do not: and thy Lord knoweth best those who are out for mischief.

(27) Then after them sent We Moses and Aaron to Pharaoh and his chiefs with Our Signs. But they were arrogant: they were a people in sin.

(28) When they had had their throw, Moses said: "What ye have brought is sorcery: Allah will surely make it of no effect: for Allah prospereth not the work of those who make mischief.

(29) But none believed in Moses except some children of his people, because of the fear of Pharaoh and his chiefs, lest they should persecute them; and certainly Pharaoh was mighty on the earth and one who transgressed all bounds.

(30) Moses prayed: "Our Lord! Thou hast indeed bestowed on Pharaoh and his chiefs splendour and wealth in the life of the present, and so, Our Lord, they mislead (men) from Thy Path. Deface, our Lord, the features of their wealth, and send hardness to their hearts, so they will not believe until they see the grievous penalty."