Hazrat Jabir (may Allah be pleased with him) narrated that this verse was revealed about us (i.e., Banu Haritha and Banu Salama): (idh hammat ta'ifatani minkum an tafshala) (Aal-e-Imran: 122) "When two parties from among you were about to lose heart." I do not wish that this verse had not been revealed, because Allah further says, "And Allah was their protector." (So, how great an honor it is for us to have received Allah's guardianship.)
Hadith Referenceاللؤلؤ والمرجان / كتاب فضائل الصحابة / 1628
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 64 كتاب المغازي: 18 باب إذ همت طائفتان منكم أن تفشلا»