Muwatta Imam Malik Book of Hajj, Hadith 174

Yahya related to me from Malik from Yahya ibn Said from Yaqub ibn Khalid al-Makhzumi that Abu Asma, the mawla of Abdullah ibn Jafar, told him that he was with Abdullah ibn Jafar when they set out once from Madina. At as-Suqya they passed by Husayn ibn Ali, who was ill at the time. Abdullah ibn Jafar stayed with him and then, when he feared that he was late (for the hajj) he left, and sent for Ali ibn Abi Talib and Asma bint Umays in Madina, and they came to Husayn. Then Husayn pointed to his head, and AIi told someone to shave his head. Then he sacrificed an animal for him at as-Suqya, killing a camel for him.
Yahya ibn Said added, "Husayn had set out with Uthman ibn Affan on that particular journey to Makka. "

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ يَعْقُوبَ بْنِ خَالِدٍ الْمَخْزُومِيِّ، عَنْ أَبِي أَسْمَاءَ، مَوْلَى عَبْدِ اللَّهِ بْنِ جَعْفَرٍ أَنَّهُ أَخْبَرَهُ أَنَّهُ، كَانَ مَعَ عَبْدِ اللَّهِ بْنِ جَعْفَرٍ فَخَرَجَ مَعَهُ مِنَ الْمَدِينَةِ فَمَرُّوا عَلَى حُسَيْنِ بْنِ عَلِيٍّ وَهُوَ مَرِيضٌ بِالسُّقْيَا فَأَقَامَ عَلَيْهِ عَبْدُ اللَّهِ بْنُ جَعْفَرٍ حَتَّى إِذَا خَافَ الْفَوَاتَ خَرَجَ وَبَعَثَ إِلَى عَلِيِّ بْنِ أَبِي طَالِبٍ وَأَسْمَاءَ بِنْتِ عُمَيْسٍ وَهُمَا بِالْمَدِينَةِ فَقَدِمَا عَلَيْهِ ثُمَّ إِنَّ حُسَيْنًا أَشَارَ إِلَى رَأْسِهِ فَأَمَرَ عَلِيٌّ بِرَأْسِهِ فَحُلِّقَ ثُمَّ نَسَكَ عَنْهُ بِالسُّقْيَا فَنَحَرَ عَنْهُ بَعِيرًا . قَالَ يَحْيَى بْنُ سَعِيدٍ وَكَانَ حُسَيْنٌ خَرَجَ مَعَ عُثْمَانَ بْنِ عَفَّانَ فِي سَفَرِهِ ذَلِكَ إِلَى مَكَّةَ .