Zakat (Kitab Al-Zakat)

Dawud :: Book 9 : Hadith 1665

Narrated Buhaysah al-Fazariyyah:

My father sought permission from the Prophet (peace_be_upon_him). (When permission was granted and he came near him) he lifted his shirt, and began to kiss him and embrace him (out of love for him). He asked: Apostle of Allah, what is the thing which it is unlawful to refuse? He replied: Water. He again asked: Prophet of Allah, what is the thing which it is unlawful to refuse? He replied: Salt. He again asked: Prophet of Allah, what is the thing which it is unlawful to refuse? He said: To do good is better for you.