The word(s) "purity" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Pickthal translation.

(1) Hast thou not seen those who praise themselves for purity? Nay, Allah purifieth whom He will, and they will not be wronged even the hair upon a date-stone.

(2) And we intended that their Lord should change him for them for one better in purity and nearer to mercy.

(3) And compassion from Our presence, and purity; and he was devout,

(4) Those who avoid enormities of sin and abominations, save the unwilled offences - (for them) lo! thy Lord is of vast mercy. He is Best Aware of you (from the time) when He created you from the earth, and when ye were hidden in the bellies of your mothers. Therefor ascribe not purity unto yourselves. He is Best Aware of him who wardeth off (evil).