Sahih al-Bukhari Book 78, Hadith 53
The Prophet (ﷺ) said, "On every Muslim there is enjoined (a compulsory) Sadaqa (alms)." They (the
people) said, "If one has nothing?' He said, "He should work with his hands so that he may benefit
himself and give in charity." They said, "If he cannot work or does not work?" He said, "Then he
should help the oppressed unhappy person (by word or action or both)." They said, "If he does not do
it?" He said, "Then he should enjoin what is good (or said what is reasonable).' They said, "If he does
not do that''' He said, "Then he should refrain from doing evil, for that will be considered for Him as a
Sadaqa (charity) . "
The Prophet (ﷺ) said, Enjoining, all that is good is a Sadaqa."
The Prophet (ﷺ) mentioned the (Hell) Fire and sought refuge (with Allah) from it, and turned his face to the other side. He mentioned the (Hell) Fire again and took refuge (with Allah) from it and turned his face to the other side. (Shu`ba, the sub-narrator, said, "I have no doubt that the Prophet (ﷺ) repeated it twice.") The Prophet (ﷺ) then said, "(O people!) Save yourselves from the (Hell) Fire even if with one half of a date fruit (given in charity), and if this is not available, then (save yourselves) by saying a good pleasant friendly word."