Quran 23:4 from Surah Al-Muminoon on Divine Marvels.
وَٱلَّذِينَ هُمۡ لِلزَّكَوٰةِ فَٰعِلُونَ
English translation: Those who [they] of purification works (are) doers
Transliteration: wa-alladhina hum lilzzakati fa'iluna