Sayyiduna Abu Umamah (may Allah be pleased with him) narrates: A man asked the Prophet (peace and blessings be upon him): What is sin? The Prophet (peace and blessings be upon him) said: When something (that is, unease) comes into your heart, then leave it (that is, that deed)! He asked: What is faith? The Prophet (peace and blessings be upon him) said: When your bad deed grieves you and your good deed pleases you, then you are a believer.
Ahmad recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 818
Hadith Gradingمحدثین:إسنادہ صحیح۔
Hadith Takhrij«اخرجه الامام احمد فى مسنده 251/5252256 ، اخرجه الامام الطبراني فى معجمه الكبير 7539 اورده المؤلف فى زوائد المسند 250 ، أخرجه مسند أحمد برقم: 21655»