Sayyidina Farwah ibn Musayk al-Muradi (RA) narrated: I went to the Prophet (SAW) and said, "O Messenger of Allah! Shall I not join those people of my tribe who have embraced Islam and fight against those who turn away from it.” He gave me permission for that and he made me amir (chief) of my tribe. When I went out from him, he asked about me, “What did al-Ghutayfi do?” He was informed that I had gone away. So he sent for me. When I came to him, some of the sahabah (RA) were sitting with him. He said, “Invite the people. So, whoso submits (to Islam), welcome him and whoso does not submit (to Islam), do not hurry (about him) till I tell you something.” The narrator reported that there was a revelation about Saba and a man asked, "O Messenger of Allah, what is Saba, a land or a woman”? He said, “Neither a land nor a woman but a man who had ten Arab sons, six of whom he regarded auspicious and four inauspicious. As for those he regarded as inauspicious, they were Lakhm, Juzam, Ghassan and Aamilah and as for those he regarded as lucky they were Azd, Ash’arun, Himyar, Kindah, Mazhij and Anmar.” The man said, "O Messenger of Allah! What is Anmar”? He said, “The one from whom spring Kath’am and Bajilah.”
[Abu Dawud 3988]