It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Our Lord says that fasting is a shield by which a person protects himself from Hell, and fasting is especially for Me, therefore I alone will give its reward.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14669
Hadith Gradingحکم دارالسلام:حديث صحيح بطرقه وشوا هده، وهذا إسناد حسن وابن لهيعة- وإن كان سيئ الحفظ - فإن رواية عبدالله بن المبارك عنه صالحة، فيحسن حديثه