The virtue of the tribes of Aslam, Ghifar, Muzaynah and Juhaynah

It is narrated from Sayyiduna Amr bin Abasah al-Sulami (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) was inspecting horses, and Uyaynah bin Badr al-Fazari was with him (peace and blessings be upon him). The Messenger of Allah (peace and blessings be upon him) said to him: "I know horses better than you do." Uyaynah said: And I know men better than you do. The Messenger of Allah (peace and blessings be upon him) asked: "Then who are the best of men?" He said: Men who carry their swords on their shoulders and rest their spears on the withers of their horses, and who are of the people of Najd. The Messenger of Allah (peace and blessings be upon him) said: "You are wrong. Rather, the best of men are the men of Yemen. Faith is Yemeni, extending to Lakhm and Judham (tribes). The ma'kul of Himyar (the one whose right is devoured) is better than its akil (the one who devours the right), and the people of Hadramawt are better than Banu al-Harith. By Allah, I would not care if both Harith (tribes) perished. May Allah Almighty curse the four kings: Jamd, Mikhwas, Mishrah and Abda'ah, and their sister al-Amarradah." Then he (peace and blessings be upon him) said: "My Lord commanded me to curse Quraysh twice, so I cursed them; and He commanded me to pray (for mercy) for them twice, so I prayed for them twice." Then he (peace and blessings be upon him) said: "May Allah Almighty curse Tamim bin Murr and Bakr bin Wa'il" — he (peace and blessings be upon him) said this seven times — and he said: "May Allah Almighty curse two tribes of Banu Tamim, Muqa'is and Muladis." Then he (peace and blessings be upon him) said: "The tribe of Usayyah has disobeyed Allah and His Messenger, except for (the clans of) Qays, Ja'dah and Ismah." Then he said: "Aslam, Ghifar, Muzaynah and those of Juhaynah joined with them will be better in the sight of Allah on the Day of Resurrection than Banu Asad, Tamim, Ghatafan and Hawazin." Then he (peace and blessings be upon him) said: "The two worst tribes among the Arabs are Najran and Banu Taghlib, and the tribe with the greatest numbers in Paradise will be the tribe of Madhhij."
This hadith is gharib (unusual) in its text, but its chain is sahih (authentic); however, the two Shaykhs did not record it.

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Aslam, Ghifar, Ashja', Muzaynah, Juhaynah and those who are of Banu Ka'b are all my mawla (close friends and devoted supporters) to the exclusion of other people, and Allah and His Messenger are their mawla."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim).