Quran 79:18 from Surah An-Naazi'aat on Divine Marvels.
فَقُلۡ هَل لَّكَ إِلَىٰٓ أَن تَزَكَّىٰ
English translation: And say Would [for] you [until] [that] purify yourself
Transliteration: faqul hal laka ila an tazakka