Musnad Ahmad 1017:1

Rawh narrated to us, Ali ibn Suwayd narrated to us, from Abdullah ibn Buraydah, from his father, who said: Uyainah ibn Badr, al-Aqra ibn Habis, and Alqamah ibn Ulathah gathered with the Prophet, peace and blessings of Allah be upon him, and they mentioned their ancestors. The Prophet, peace and blessings of Allah be upon him, said: "If you remain silent, I will inform you. The ancestor of Banu Amir is a red or dark-colored camel that eats from the tips of trees." He said: "And I think he said: in a meadow." "And Ghatafan is a rough hillock that repels people from it." Al-Aqra ibn Habis said: "Then where is the ancestor of Banu Tamim?" He said: "If only you had remained silent."