What is the authenticity of the hadith: "The worst two tribes among the Arabs are Najran and Banu Taghlib, and the most numerous tribes in Paradise are Madhhij"?

The Hadith: "The two worst tribes among the Arabs are Najran and Banu Taghlib. And the tribe with the most people in Paradise is Madhhij." This Hadith was narrated by Imam Ahmad, Al-Hakim, and others with an authentic chain of transmission, and it was authenticated by a number of Hadith scholars. Despite this, no one has delved into explaining its meaning or jurisprudence. As for the established principle, it is that sincere righteous deeds determine entry into Paradise, regardless of tribe, and that a person is held accountable for their bad deeds, and their lineage will not benefit them.