Al-Adab Al-Mufrad #808

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.'"