Sahih al-Bukhari 1723
Sahih al-Bukhari · Book 25: Hajj (Pilgrimage) · Slaughtering before having one's head shaved
Narrated Ibn `Abbas:
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، حَدَّثَنَا عَبْدُ الأَعْلَى ، حَدَّثَنَا خَالِدٌ ، عَنْ عِكْرِمَةَ ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ سُئِلَ النَّبِيُّ صلى الله عليه وسلم فَقَالَ رَمَيْتُ بَعْدَ مَا أَمْسَيْتُ. فَقَالَ " لاَ حَرَجَ ". قَالَ حَلَقْتُ قَبْلَ أَنْ أَنْحَرَ. قَالَ " لاَ حَرَجَ " .
The Prophet (ﷺ) was asked by a man who said, "I have done the Rami in the evening." The Prophet (ﷺ) replied, "There is no harm in it." Another man asked, "I had my head shaved before the slaughtering." The Prophet (ﷺ) replied, "There is no harm in it."