Messenger of Allah ﷺ stopped while riding his camel and the people began to ask him. One of the inquirers said: Messenger of Allah, I did not know that pebbles should be thrown before sacrificing the animal, and by mistake I sacrificed the animal before throwing pebbles, whereupon Messenger of Allah ﷺ said: (Now) throw pebbles and there is no harm in it. Then another (person) came saying: I did not know that the animal was to be sacrificed before shaving, but I got myself shaved before sacrificing the animal, whereupon he (the Holy Prophet) said: Sacrifice the animal (now) and there is no harm in it. He (the narrator) said: I did not hear that anything was asked on that day (shout a matter) which a person forgot and could not observe the sequence or anything like it either due to forgetfulness or ignorance, but Messenger of Allah ﷺ said (about that): Do it; there is no harm in it.  

أَنَّهُ سَمِعَ عَبْدَ اللَّهِ بْنَ عَمْرِو بْنِ الْعَاصِ يَقُولُ وَقَفَ رَسُولُ اللَّهِ ﷺ عَلَى رَاحِلَتِهِ فَطَفِقَ نَاسٌ يَسْأَلُونَهُ فَيَقُولُ الْقَائِلُ مِنْهُمْ يَا رَسُولَ اللَّهِ إِنِّي لَمْ أَكُنْ أَشْعُرُ أَنَّ الرَّمْىَ قَبْلَ النَّحْرِ فَنَحَرْتُ قَبْلَ الرَّمْىِ فَقَالَ رَسُولُ اللَّهِ ﷺ فَارْمِ وَلاَ حَرَجَ قَالَ وَطَفِقَ آخَرُ يَقُولُ إِنِّي لَمْ أَشْعُرْ أَنَّ النَّحْرَ قَبْلَ الْحَلْقِ فَحَلَقْتُ قَبْلَ أَنْ أَنْحَرَ فَيَقُولُ انْحَرْ وَلاَ حَرَجَ قَالَ فَمَا سَمِعْتُهُ يُسْأَلُ يَوْمَئِذٍ عَنْ أَمْرٍ مِمَّا يَنْسَى الْمَرْءُ وَيَجْهَلُ مِنْ تَقْدِيمِ بَعْضِ الأُمُورِ قَبْلَ بَعْضٍ وَأَشْبَاهِهَا إِلاَّ قَالَ رَسُولُ اللَّهِ ﷺ افْعَلُوا ذَلِكَ وَلاَ حَرَجَ  

Yahya related to me from Malik from Ibn Shihab from clsa ibn Talha that Abdullah ibn Amr ibn al-As said, "The Messenger of Allah ﷺ stopped for the people at Mina, and they questioned him and a man came and said to him, 'Messenger of Allah, I was unclear about what to do and I shaved before sacrificing,' and the Messenger of Allah ﷺ said, 'Sacrifice, and don't worry.' Then another came to him and said 'Messenger of Allah, I was unclear about what to do and I sacrificed before throwing the stones.' He advised, 'Throw, and don't worry.' " Amr continued, saying that the Messenger of Allah ﷺ was not asked about anything done before or after without his saying, "Do it, and don't worry."  

أَنَّهُ قَالَ وَقَفَ رَسُولُ اللَّهِ ﷺ لِلنَّاسِ بِمِنًى وَالنَّاسُ يَسْأَلُونَهُ فَجَاءَهُ رَجُلٌ فَقَالَ لَهُ يَا رَسُولَ اللَّهِ لَمْ أَشْعُرْ فَحَلَقْتُ قَبْلَ أَنْ أَنْحَرَ فَقَالَ رَسُولُ اللَّهِ ﷺ انْحَرْ وَلاَ حَرَجَ ثُمَّ جَاءَهُ آخَرُ فَقَالَ يَا رَسُولَ اللَّهِ لَمْ أَشْعُرْ فَنَحَرْتُ قَبْلَ أَنْ أَرْمِيَ قَالَ ارْمِ وَلاَ حَرَجَ قَالَ فَمَا سُئِلَ رَسُولُ اللَّهِ ﷺ عَنْ شَىْءٍ قُدِّمَ وَلاَ أُخِّرَ إِلاَّ قَالَ افْعَلْ وَلاَ حَرَجَ