Not graded
Al-Adab al-Mufrad 806
حَدَّثَنَا بِشْرُ بْنُ الْحَكَمِ، قَالَ: حَدَّثَنَا مَحْبُوبُ بْنُ مُحْرِزٍ الْكُوفِيُّ، قَالَ: حَدَّثَنَا الصَّعْبُ بْنُ حَكِيمٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ قَالَ: أَتَيْتُ عُمَرَ بْنَ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ، فَجَعَلَ يَقُولُ: يَا ابْنَ أَخِي، ثُمَّ سَأَلَنِي؟ فَانْتَسَبْتُ لَهُ، فَعَرَفَ أَنَّ أَبِي لَمْ يُدْرِكِ الإِسْلاَمَ، فَجَعَلَ يَقُولُ: يَا بُنَيَّ يَا بُنَيَّ.
As-Sa'b ibn Hakim reported that his grandfather said, "I came to 'Umar ibn al-Khattab, may Allah be pleased with him. He began to say, 'Nephew.' Then he questioned me and I told him my lineage and so he knew that my father had not become Muslim. He began to say, 'My son, my son.'"
Cited in Al-Adab al-Mufrad (No. 806).