Bulugh al-Maram, Book 6, Hadith 59 (In-Book)

Al-Maisur bin Makhramah (RAA) narrated, ‘The Messenger of Allah sacrificed his animal before he shaved and commanded his companions to do so.’ Related by Al-Bukhari.

وَعَنْ اَلْمِسْوَرِ بْنِ مَخْرَمَةَ رَضِيَ اَللَّهُ عَنْهُمَا { أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-نَحَرَ قَبْلَ أَنْ يَحْلِقَ, وَأَمَرَ أَصْحَابَهُ بِذَلِكَ } رَوَاهُ اَلْبُخَارِيُّ 1‏.‏ ‏1 ‏- صحيح.‏ رواه البخاري ( 1811 )‏.‏

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also referenced under: Book 6, Hadith 786 (English)