The word(s) "perfect" appears 18 time(s) in 17 verse(s) in Quran in Muhammad Pickthal translation.

(1) Forbidden unto you (for food) are carrion and blood and swineflesh, and that which hath been dedicated unto any other than Allah, and the strangled, and the dead through beating, and the dead through falling from a height, and that which hath been killed by (the goring of) horns, and the devoured of wild beasts, saving that which ye make lawful (by the death-stroke), and that which hath been immolated unto idols. And (forbidden is it) that ye swear by the divining arrows. This is an abomination. This day are those who disbelieve in despair of (ever harming) your religion; so fear them not, fear Me! This day have I perfected your religion for you and completed My favour unto you, and have chosen for you as religion al-Islam. Whoso is forced by hunger, not by will, to sin: (for him) lo! Allah is Forgiving, Merciful.

(2) O ye who believe! When ye rise up for prayer, wash you faces, and your hands up to the elbows, and lightly rub your heads and (wash) your feet up to the ankles. And if ye are unclean, purify yourselves. And if ye are sick or on a journey, or one of you cometh from the closet, or ye have had contact with women, and ye find not water, then go to clean, high ground and rub your faces and your hands with some of it. Allah would not place a burden on you, but He would purify you and would perfect His grace upon you, that ye may give thanks.

(3) perfected is the Word of thy Lord in truth and justice. There is naught that can change His words. He is the Hearer, the Knower.

(4) Fain would they put out the light of Allah with their mouths, but Allah disdaineth (aught) save that He shall perfect His light, however much the disbelievers are averse.

(5) Alif. Lam. Ra. (This is) a Scripture the revelations whereof are perfected and then expounded. (It cometh) from One Wise, Informed,

(6) Thus thy Lord will prefer thee and will teach thee the interpretation of events, and will perfect His grace upon thee and upon the family of Jacob as He perfected it upon thy forefathers, Abraham and Isaac. Lo! thy Lord is Knower, Wise.

(7) Save such of them as are Thy perfectly devoted slaves.

(8) And Allah hath given you, of that which He hath created, shelter from the sun; and hath given you places of refuge in the mountains, and hath given you coats to ward off the heat from you, and coats (of armour) to save you from your own foolhardiness. Thus doth He perfect His favour unto you, in order that ye may surrender (unto Him).

(9) And had chosen seclusion from them. Then We sent unto her Our Spirit and it assumed for her the likeness of a perfect man.

(10) Then exalted be Allah, the True King! And hasten not (O Muhammad) with the Qur'an ere its revelation hath been perfected unto thee, and say: My Lord! Increase me in knowledge.