Sahih
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ الزُّهْرِيِّ، عَنْ عِيسَى بْنِ طَلْحَةَ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ سُئِلَ عَمَّنْ ذَبَحَ قَبْلَ أَنْ يَحْلِقَ أَوْ حَلَقَ قَبْلَ أَنْ يَذْبَحَ قَالَ " لاَ حَرَجَ " .
It was narrated from ‘Abdullah bin ‘Amr that the Prophet (ﷺ) was asked about a man who slaughtered his sacrifice before shaving his head, or who shaved his head before slaughtering his sacrifice, and he said:“There is no harm in that.”