Abu Qatadah reported that Allah's Messenger ﷺ said:
"The best that a man can leave behind after his death are three things: a righteous child who makes du'a for him, an ongoing sadaqah whose rewards continue to reach him, and knowledge that continues to be implemented after him."
— Ibn Majah and others; verified as sahih by Al-Mundhiri and Al-Albani
Why This Narration Deserves a Book
Because it describes the only mechanism by which a person's account keeps growing after he can no longer act.
Everything else stops at death. These three continue — and that makes the question of what a person establishes during his life a considerably more urgent one than it otherwise appears.
What Each One Involves in Practice
Ongoing sadaqah — something that keeps producing benefit: a well, a masjid, a tree, a book placed where it will be read, an endowment. Not a donation spent once.
Beneficial knowledge — what a person taught, wrote or passed on that others are still acting on. This is the widest of the three and the most overlooked: a parent who taught a child to pray properly has left knowledge behind.
A righteous child who supplicates — which is why raising children well is treated in Islam as an investment rather than only a duty. The condition is righteous; a child who does not pray does not supplicate.
Who It Is For
Anyone thinking about what they will leave. Particularly parents, teachers and those in a position to establish something lasting.
Related Reading