Sunan an-Nasa'i, Book 48, Hadith 188 (In-Book) ⓘ

It was narrated that 'Abdullah bin Ja'far said: "The Messenger of Allah [SAW] stayed away from the family of Ja'far (when he died) for three days, then he came to them, and said: 'Do not weep for my brother after today.' Then he said: 'Call my brother's sons to me.' We were brought like little chicks, and he said: 'Call the barber for me.' Then he ordered that our heads be shaved."

أَخْبَرَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، قَالَ أَنْبَأَنَا وَهْبُ بْنُ جَرِيرٍ، قَالَ حَدَّثَنَا أَبِي قَالَ، سَمِعْتُ مُحَمَّدَ بْنَ أَبِي يَعْقُوبَ، يُحَدِّثُ ‏{‏ عَنِ الْحَسَنِ بْنِ سَعْدٍ، ‏}‏ عَنْ عَبْدِ اللَّهِ بْنِ جَعْفَرٍ، قَالَ أَمْهَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم آلَ جَعْفَرٍ ثَلاَثَةً أَنْ يَأْتِيَهُمْ ثُمَّ أَتَاهُمْ فَقَالَ ‏"‏ لاَ تَبْكُوا عَلَى أَخِي بَعْدَ الْيَوْمِ ‏"‏ ‏.‏ ثُمَّ قَالَ ‏"‏ ادْعُوا إِلَىَّ بَنِي أَخِي ‏"‏ ‏.‏ فَجِيءَ بِنَا كَأَنَّا أَفْرُخٌ فَقَالَ ‏"‏ ادْعُوا لِي الْحَلاَّقَ ‏"‏ ‏.‏ فَأَمَرَ بِحَلْقِ رُءُوسِنَا ‏.‏ مُخْتَصَرٌ ‏.‏