‘Abd Allaah bin ‘Amr bin Al ‘As said “The Messenger of Allah(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 Messenger of Allah(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.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عِيسَى بْنِ طَلْحَةَ بْنِ عُبَيْدِ اللَّهِ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ، أَنَّهُ قَالَ وَقَفَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي حَجَّةِ الْوَدَاعِ بِمِنًى يَسْأَلُونَهُ فَجَاءَهُ رَجُلٌ فَقَالَ يَا رَسُولَ اللَّهِ إِنِّي لَمْ أَشْعُرْ فَحَلَقْتُ قَبْلَ أَنْ أَذْبَحَ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " اذْبَحْ وَلاَ حَرَجَ " . وَجَاءَ رَجُلٌ آخَرُ فَقَالَ يَا رَسُولَ اللَّهِ لَمْ أَشْعُرْ فَنَحَرْتُ قَبْلَ أَنْ أَرْمِيَ . قَالَ " ارْمِ وَلاَ حَرَجَ " . قَالَ فَمَا سُئِلَ يَوْمَئِذٍ عَنْ شَىْءٍ قُدِّمَ أَوْ أُخِّرَ إِلاَّ قَالَ " اصْنَعْ وَلاَ حَرَجَ " .
sunnah.com