Buhaysah reported on the authority of his father:My father sought permission from the Prophet (ﷺ). (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: Messenger 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

English translation · Sunan Abu Dawud