[Machine] The Messenger of Allah ﷺ stood during the Farewell Hajj and a man said, "O Messenger of Allah, I shaved my head before slaughtering the animal." He ﷺ said, "There is no harm in that." He ﷺ was not asked about anything, whether it was done before or after, except that he ﷺ said, "There is no harm in that."  

وَقَفَ رَسُولُ اللهِ ﷺ فِي حَجَّةِ الْوَدَاعِ فَقَالَ رَجُلٌ يَا رَسُولَ اللهِ حَلَقْتُ قَبْلَ أَنْ أَذْبَحَ قَالَ «لَا حَرَجَ» فَمَا سُئِلَ عَنْ شَيْءٍ قُدِّمَ وَلَا أُخِّرَ إِلَّا قَالَ «لَا حَرَجَ»  

‘Abd Allaah bin ‘Amr bin Al ‘As said “The Apostle of Allaah ﷺ stopped during the Farewell Pilgrimage at Mina, as the people were to ask him(about the rites of Hajj). A man came and said Apostle of Allaah being ignorant, I shaved before sacrificing. The Apostle of Allaah ﷺ replied “Sacrifice, for no harm will come.” Another man came and said “Apostle of Allaah ﷺ, being ignorant, I sacrificed before throwing the pebbles.” He replied “Throw them for no harm will come.” He (the Prophet) was not asked about anything which had been done before or after its proper time without saying “Do it, for no harm will come.” (Using translation from Abū Dāʾūd 2014)   

أَنَّ رَسُولَ اللهِ ﷺ وَقَفَ لِلنَّاسِ عَامَ حَجَّةَ الْوَدَاعِ يَسْأَلُونَهُ فَجَاءَهُ رَجُلٌ فَقَالَ يَا رَسُولَ اللهِ لَمْ أَشْعُرْ فَنَحَرْتُ قَبْلَ أَنْ أَرْمِيَ قَالَ «ارْمِ وَلَا حَرَجَ» قَالَ آخَرُ يَا رَسُولَ اللهِ لَمْ أَشْعُرْ فَحَلَقْتُ قَبْلَ أَنْ أَذْبَحَ قَالَ «اذْبَحْ وَلَا حَرَجَ» قَالَ فَمَا سُئِلَ رَسُولُ اللهِ ﷺ عَنْ شَيْءٍ قُدِّمَ وَلَا أُخِّرَ إِلَّا قَالَ افْعَلْ وَلَا حَرَجَ