It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "It is not lawful for a believer to cut off his brother for more than three days."
No one narrated this hadith from Ibrahim al-Sa'igh (may Allah have mercy on him) except Sallam al-Tawil (may Allah have mercy on him), and al-Qasim bin al-Hakam (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الميم / 7032
Hadith Takhrij«أخرجه مسلم فى «صحيحه» برقم: 2561، وأحمد فى «مسنده» برقم: 5455، والطبراني فى «الأوسط» برقم: 9145»