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  

As Allah's Apostle. ﷺ was delivering sermon on the Day of Nahr, a man stood up before him and said: Messenger of Allah, I did not know that such and such (rite was to be performed) before such and such (rite). Then another man came and said: Messenger of Allah, I thought that such and such (rite) should precede such and such (rite), and then another man came and said: Messenger of Allah, I had thought that such and such was before such and such, and such and such (is the sequence) of the three (rites, viz. throwing of pebbles, sacrificing of animal and shaving of one's head). He said to all these three: Do now (if you have not observed the cequence) ; there is no harm in it.  

أَنَّ النَّبِيَّ ﷺ بَيْنَا هُوَ يَخْطُبُ يَوْمَ النَّحْرِ فَقَامَ إِلَيْهِ رَجُلٌ فَقَالَ مَا كُنْتُ أَحْسِبُ يَا رَسُولَ اللَّهِ أَنَّ كَذَا وَكَذَا قَبْلَ كَذَا وَكَذَا ثُمَّ جَاءَ آخَرُ فَقَالَ يَا رَسُولَ اللَّهِ كُنْتُ أَحْسِبُ أَنَّ كَذَا قَبْلَ كَذَا وَكَذَا لِهَؤُلاَءِ الثَّلاَثِ قَالَ افْعَلْ وَلاَ حَرَجَ