Ubayd al-A'raj narrates: My grandmother told me that she came to the Prophet (peace and blessings be upon him) while the Prophet (peace and blessings be upon him) was having his morning meal; this was on a Saturday. The Prophet (peace and blessings be upon him) said to her: "Come forward and eat." She said: "I am fasting." The Prophet (peace and blessings be upon him) said: "Did you fast yesterday?" She replied: "No." The Prophet (peace and blessings be upon him) said: "Then eat, for the fast of Saturday is neither for you nor against you (that is, there is neither sin nor reward in it)."
(Allamah Haythami says:) I say: A different hadith from this woman about fasting on Saturday is reported in the Sunan.
Ahmad recorded it. Its chain contains Ibn Lahi'ah, and he has been criticised.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصيام / 5200
Hadith Gradingمحدثین:إسناده ضعیف
Hadith Takhrij«اخرجه احمد فى المسند (368/6) ، أخرجه مسند أحمد برقم: 26536»