Quran 41:7 from Surah Fussilat on Divine Marvels.
ٱلَّذِينَ لَا يُؤۡتُونَ ٱلزَّكَوٰةَ وَهُم بِٱلۡأٓخِرَةِ هُمۡ كَٰفِرُونَ
English translation: Those who (do) not give the zakah and they in the Hereafter they (are) disbelievers
Transliteration: alladhina la yu'tuna al-zakata wahum bil-akhirati hum kafiruna