Sahih Bukhari Volume 5, Book 64, Hadith 4396

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا أَبُو عَوَانَةَ، حَدَّثَنَا عَبْدُ الْمَلِكِ، عَنْ عَمْرِو بْنِ حُرَيْثٍ، عَنْ عَدِيِّ بْنِ حَاتِمٍ، قَالَ أَتَيْنَا عُمَرَ فِي وَفْدٍ، فَجَعَلَ يَدْعُو رَجُلاً رَجُلاً وَيُسَمِّيهِمْ فَقُلْتُ أَمَا تَعْرِفُنِي يَا أَمِيرَ الْمُؤْمِنِينَ قَالَ بَلَى، أَسْلَمْتَ إِذْ كَفَرُوا، وَأَقْبَلْتَ إِذْ أَدْبَرُوا، وَوَفَيْتَ إِذْ غَدَرُوا، وَعَرَفْتَ إِذْ أَنْكَرُوا‏.‏ فَقَالَ عَدِيٌّ فَلاَ أُبَالِي إِذًا‏.‏

Narrated By 'Adi bin Hatim : We came to 'Umar in a delegation (during his rule). He started calling the men one by one, calling each by his name. (As he did not call me early) I said to him. "Don't you know me, O chief of the Believers?" He said, "Yes, you embraced Islam when they (i.e. your people) disbelieved; you have come (to the Truth) when they ran away; you fulfilled your promises when they broke theirs; and you recognized it (i.e. the Truth of Islam) when they denied it." On that, 'Adi said, "I therefore don't care."