Narrated Abu Hurairah (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "When a son of Adam (i.e. any human being) dies his deeds are discontinued, with three exceptions: Sadaqah, whose benefit is continuous; or knowledge from which benefit continues to be reaped, or a righteous child who supplicates for him." [Reported by Muslim] .

Narrated Ibn 'Umar (RA): 'Umar (RA) got some land in Khaibar and went to the Prophet ( صلی اللہ علیہ وسلم ) asking his command regarding it and said, "O Allah's Messenger, I have acquired a land in Khaibar which is the most valuable property that I have ever acquired." He replied, "If you wish you may make the property an endowment and give its produce as Sadaqah." So 'Umar (RA) gave the land as Sadaqah (in endowment on the condition) that must not be sold, inherited, or given away. And he gave its produce as Sadaqah to be devoted to the poor, relatives, the emancipation of salves, in Allah's Cause, for travelers and guests, and there is no sin upon the one who administers it if he eats something from it in a reasonable manner or gives something to a friend to eat, provided he does not store anything as goods (for himself). [Agreed upon; the wording is Muslim's] . A narration by al-Bukhari has: "He gave the land in Sadaqah (as an endowment) that must not be sold or gifted, but its produce must be spent (as Sadaqah)."

Narrated Abu Hurairah (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) sent 'Umar (RA) to collect Sadaqah..." The narrator reported the Hadith and it contains: "As for Khalid, he has kept back his coats of mail and weapons to use them in Allah's Cause." [Agreed upon] .