Narrated Abu Ad-Darda:

While I was sitting with the Prophet, Abu Bakr came, lifting up one corner of h is garment uncovering h is knee. The Prophet ﷺ said, "Your companion has had a quarrel." Abu Bakr greeted (the Prophet ) and said, "O Allah's Apostle! There was something (i.e. quarrel) between me and the Son of Al-Khattab. I talked to him harshly and then regretted that, and requested him to forgive me, but he refused. This is why I have come to you." The Prophet ﷺ said thrice, "O Abu Bakr! May Allah forgive you." In the meanwhile, 'Umar regretted (his refusal of Abu Bakr's excuse) and went to Abu Bakr's house and asked if Abu Bakr was there. They replied in the negative. So he came to the Prophet and greeted him, but signs of displeasure appeared on the face of the Prophet till Abu Bakr pitied ('Umar), so he knelt and said twice, "O Allah's Apostle! By Allah! I was more unjust to him (than he to me)." The Prophet ﷺ said, "Allah sent me (as a Prophet) to you (people) but you said (to me), 'You are telling a lie,' while Abu Bakr said, 'He has said the truth,' and consoled me with himself and his money." He then said twice, "Won't you then give up harming my companion?" After that nobody harmed Abu Bakr.

حَدَّثَنِي هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا صَدَقَةُ بْنُ خَالِدٍ، حَدَّثَنَا زَيْدُ بْنُ وَاقِدٍ، عَنْ بُسْرِ بْنِ عُبَيْدِ اللَّهِ، عَنْ عَائِذِ اللَّهِ أَبِي إِدْرِيسَ، عَنْ أَبِي الدَّرْدَاءِ ـ رضى الله عنه ـ قَالَ كُنْتُ جَالِسًا عِنْدَ النَّبِيِّ ﷺ إِذْ أَقْبَلَ أَبُو بَكْرٍ آخِذًا بِطَرَفِ ثَوْبِهِ حَتَّى أَبْدَى عَنْ رُكْبَتِهِ، فَقَالَ النَّبِيُّ ﷺ " أَمَّا صَاحِبُكُمْ فَقَدْ غَامَرَ ". فَسَلَّمَ، وَقَالَ إِنِّي كَانَ بَيْنِي وَبَيْنَ ابْنِ الْخَطَّابِ شَىْءٌ فَأَسْرَعْتُ إِلَيْهِ ثُمَّ نَدِمْتُ، فَسَأَلْتُهُ أَنْ يَغْفِرَ لِي فَأَبَى عَلَىَّ، فَأَقْبَلْتُ إِلَيْكَ فَقَالَ " يَغْفِرُ اللَّهُ لَكَ يَا أَبَا بَكْرٍ ". ثَلاَثًا، ثُمَّ إِنَّ عُمَرَ نَدِمَ فَأَتَى مَنْزِلَ أَبِي بَكْرٍ فَسَأَلَ أَثَمَّ أَبُو بَكْرٍ فَقَالُوا لاَ. فَأَتَى إِلَى النَّبِيِّ ﷺ، فَسَلَّمَ فَجَعَلَ وَجْهُ النَّبِيِّ ﷺ يَتَمَعَّرُ حَتَّى أَشْفَقَ أَبُو بَكْرٍ، فَجَثَا عَلَى رُكْبَتَيْهِ فَقَالَ يَا رَسُولَ اللَّهِ، وَاللَّهِ أَنَا كُنْتُ أَظْلَمَ مَرَّتَيْنِ. فَقَالَ النَّبِيُّ ﷺ " إِنَّ اللَّهَ بَعَثَنِي إِلَيْكُمْ فَقُلْتُمْ كَذَبْتَ. وَقَالَ أَبُو بَكْرٍ صَدَقَ. وَوَاسَانِي بِنَفْسِهِ وَمَالِهِ، فَهَلْ أَنْتُمْ تَارِكُو لِي صَاحِبِي ". مَرَّتَيْنِ فَمَا أُوذِيَ بَعْدَهَا.