Sahih Muslim Book - 15, Hadith - 3156

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنِ ابْنِ شِهَابٍ عَنْ عِيسَى بْنِ طَلْحَةَ بْنِ عُبَيْدِ اللَّهِ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ قَالَ وَقَفَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- فِى حَجَّةِ الْوَدَاعِ بِمِنًى لِلنَّاسِ يَسْأَلُونَهُ فَجَاءَ رَجُلٌ فَقَالَ يَا رَسُولَ اللَّهِ لَمْ أَشْعُرْ فَحَلَقْتُ قَبْلَ أَنْ أَنْحَرَ. فَقَالَ « اذْبَحْ وَلاَ حَرَجَ ». ثُمَّ جَاءَهُ رَجُلٌ آخَرُ فَقَالَ يَا رَسُولَ اللَّهِ لَمْ أَشْعُرْ فَنَحَرْتُ قَبْلَ أَنْ أَرْمِىَ فَقَالَ « ارْمِ وَلاَ حَرَجَ ». قَالَ فَمَا سُئِلَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- عَنْ شَىْءٍ قُدِّمَ وَلاَ أُخِّرَ إِلاَّ قَالَ « افْعَلْ وَلاَ حَرَجَ ».

It was narrated the Abdullah bin Amr bin Al-As said: “During the Farewell Pilgrimage, the Messenger of Allah (SAW) stopped in Mina and the people asked him questions. A man came and said: ‘O Messenger of Allah, I didn’t realize and I shaved my head before offering the sacrifice. ’ He said: ‘Offer your sacrifice, it doesn’t matter.’ Then another man came and said: ‘O Messenger of Allah, I didn’t realize and offered my sacrifice before stoning the Jamrah.’ He said: ‘Stone it, it doesn’t matter.’”He said: “The Messenger of Allah (SAW) was not asked about anything that was done sooner or later, but he said: ‘Do it, it doesn’t matter.’”