It is narrated from Sayyiduna Anas (may Allah be pleased with him) that Sayyiduna Sa'd (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) and said: "O Messenger of Allah! My mother has died and she did not make a bequest. Will it benefit her if I give charity on her behalf?" He (peace and blessings be upon him) said: "Yes, and hold fast to (giving) water."
Musa bin Harun (may Allah have mercy on him) said: "Marwan made an error in this narration in Makkah; in fact it is narrated from Humayd, from al-Hasan."
Hadith Referenceالمعجم الأوسط / باب الميم / 8061
Hadith Gradingمحدثین:رجاله رجال الصحيح
Hadith Takhrij«قال الهيثمي: رجاله رجال الصحيح «مجمع الزوائد ومنبع الفوائد، ج 3، ص 138»» «أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 2056»