What is Permissible and What Is Not Permissible to Dedicate to the Deceased
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Q: Do deeds reach the deceased?
A: What reaches them is what the Shari'ah indicates reaches them; based on the saying of the Prophet (peace and blessings be upon him):Riyad as-Salihin 1383 narrated by Muslim in his Sahih, and other hadiths that have come regarding this. Among these are: charity, supplication, Hajj, 'Umrah, and the spreading of knowledge left behind by the deceased.
As for dedicating prayer, recitation, tawaf, or voluntary fasting to the deceased, I do not know of any basis for this, and it is prescribed to leave it off; based on the saying of the Prophet (peace and blessings be upon him):Sahih Muslim 1718b narrated by Muslim in his Sahih.
A: What reaches them is what the Shari'ah indicates reaches them; based on the saying of the Prophet (peace and blessings be upon him):
When a man dies, his deeds come to an end except for three things: Sadaqah Jariyah (ceaseless charity); a knowledge which is beneficial, or a virtuous descendant who prays for him (for the deceased).
إذا مات ابن آدم انقطع عمله إلا من ثلاث: صدقة جارية، أو علم ينتفع به، أو ولد صالح يدعو لهAs for dedicating prayer, recitation, tawaf, or voluntary fasting to the deceased, I do not know of any basis for this, and it is prescribed to leave it off; based on the saying of the Prophet (peace and blessings be upon him):
He who did any act for which there is no sanction from our behalf, that is to be rejected.
من عمل عملا ليس عليه أمرنا فهو رد
Source
binbaz.org.sa
The Arabic text is copied verbatim from the original source, without any edits.