I witnessed the Prophet ﷺ when he was delivering the sermon on the Day of Nahr. A man stood up and said, "I thought that such and such was to be done before such and such. I got my hair shaved before slaughtering." (Another said), "I slaughtered the Hadi before doing the Rami." So, the people asked about many similar things. The Prophet ﷺ said, "Do it (now) and there is no harm in all these cases." Whenever the Prophet ﷺ was asked about anything on that day, he replied, "Do it (now) and there is no harm in it."  

أَنَّهُ شَهِدَ النَّبِيَّ ﷺ يَخْطُبُ يَوْمَ النَّحْرِ فَقَامَ إِلَيْهِ رَجُلٌ فَقَالَ كُنْتُ أَحْسِبُ أَنَّ كَذَا قَبْلَ كَذَا ثُمَّ قَامَ آخَرُ فَقَالَ كُنْتُ أَحْسِبُ أَنَّ كَذَا قَبْلَ كَذَا حَلَقْتُ قَبْلَ أَنْ أَنْحَرَ نَحَرْتُ قَبْلَ أَنْ أَرْمِيَ وَأَشْبَاهَ ذَلِكَ فَقَالَ النَّبِيُّ ﷺ افْعَلْ وَلاَ حَرَجَ لَهُنَّ كُلِّهِنَّ فَمَا سُئِلَ يَوْمَئِذٍ عَنْ شَىْءٍ إِلاَّ قَالَ افْعَلْ وَلاَ حَرَجَ  

While the Prophet ﷺ was delivering a sermon on the Day of Nahr (i.e., 10th Dhul-Hijja-Day of slaughtering the sacrifice), a man got up saying, "I thought, O Messenger of Allah ﷺ, such-and-such a thing was to be done before such-and-such a thing." Another man got up, saying, "O Messenger of Allah ﷺ! As regards these three (acts of Hajj), thought so-and-so." The Prophet ﷺ said, "Do, and there is no harm," concerning all those matters on that day. And so, on that day, whatever question he was asked, he said, "Do it, do it, and there is no harm therein."  

أَنَّ النَّبِيَّ ﷺ بَيْنَمَا هُوَ يَخْطُبُ يَوْمَ النَّحْرِ إِذْ قَامَ إِلَيْهِ رَجُلٌ فَقَالَ كُنْتُ أَحْسِبُ يَا رَسُولَ اللَّهِ كَذَا وَكَذَا قَبْلَ كَذَا وَكَذَا ثُمَّ قَامَ آخَرُ فَقَالَ يَا رَسُولَ اللَّهِ كُنْتُ أَحْسِبُ كَذَا وَكَذَا لِهَؤُلاَءِ الثَّلاَثِ فَقَالَ النَّبِيُّ ﷺ افْعَلْ وَلاَ حَرَجَ لَهُنَّ كُلِّهِنَّ يَوْمَئِذٍ فَمَا سُئِلَ يَوْمَئِذٍ عَنْ شَىْءٍ إِلاَّ قَالَ افْعَلْ وَلاَ حَرَجَ