وَعَن عبدِ الله بن جَعْفَرٍ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَمْهَلَ آلَ جَعْفَرٍ ثَلَاثًا ثُمَّ أَتَاهُمْ فَقَالَ: «لَا تَبْكُوا عَلَى أَخِي بَعْدِ الْيَوْمِ» . ثُمَّ قَالَ: «ادْعُوا لِي بَنِي أَخِي» . فَجِيءَ بِنَا كَأَنَّا أَفْرُخٌ فَقَالَ: «ادْعُوا لِي الْحَلَّاقَ» فَأَمَرَهُ فَحَلَقَ رؤوسنا. رَوَاهُ أَبُو دَاوُد وَالنَّسَائِيّ

The Prophet waited three days before visiting the family of Ja'far (Ja'far b. Abu Talib was killed at Mu'ta in the year 7 A.H). He said, “Do not weep for my brother after today,” and then said, “Call my brother’s children to me.” When we had been brought like a number of chickens he said, “Call me a barber,” and then ordered him to shave our heads. Abu Dawud and Nasa’i transmitted it.