Sunan Ibn Majah 2612

Muslim bin Haisam narrated from Ash'ath bin Qais who said:“I came to the Messenger of Allah (ﷺ) with a delegation from Kindah, and they thought that I was the best of them. I said: 'O Messenger of Allah (ﷺ) are you not from among us?' He said: 'We are the tribe of Banu Nadr bin Kinanah, and we do not attribute ourselves to our mother and we do not deny our forefathers.'”He said: “Ash'ath bin Qais used to say: 'If any man is brought to me who suggests that a man from Quraish does not belong to Nadr bin Kinanah, I would carry out the legal punishment (for slander) on him.'”