Chapter 23: The Book of Zakah
It was narrated from 'Abdur-Rahman bin Ghanm that Abu Malik Al-Ash' ari told him that the Messenger of Allah said: "Isbagh Al-Wudu is half of faith; Alhamdu lillah (praise be to Allah) fills the balance; the Tasbih and the Takbir fill the heavens and Earth; the Salah is light; the Zakah is a sign (of sincerity); patience is an illuminating torch; and the Qur' an is proof, either for you or against you."
Sunan an-Nasa'i 2437