Sayyiduna Jabir (may Allah be pleased with him) reports that the Prophet (peace and blessings be upon him) said: "Allah Almighty says: Fasting is a shield by which the servant protects himself from Hell. It is for Me, and I shall reward it."
Ahmad recorded it, and its chain is hasan (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصيام / 5077
Hadith Gradingمحدثین:إسنادہ حسن۔
Hadith Takhrij«اخرجه احمد فى المسند (396/3) ، أخرجه مسند أحمد برقم: 14840»