The word(s) "unclean" appears 18 time(s) in 14 verse(s) in Quran in Muhammad Habib Shakir translation.

(11) unclean things are for unclean ones and unclean ones are for unclean things, and the good things are for good ones and the good ones are for good things; these are free from what they say; they shall have forgiveness and an honorable sustenance.

(12) And stay in your houses and do not display your finery like the displaying of the ignorance of yore; and keep up prayer, and pay the poor-rate, and obey Allah and His Apostle. Allah only desires to keep away the uncleanness from you, O people of the House! and to purify you a (thorough) purifying.

(13) This is guidance; and (as for) those who disbelieve in the communications of their Lord, they shall have a painful punishment on account of uncleanness.

(14) And uncleanness do shun,