It was fortunate for the Tulunids that the Arab alliance established by Al-Amri in the land of metal did not last long due to a disagreement that arose between the allies and the Arab tribes. The direct cause of this was that "Ibrahim Al-Makhzumi," Al-Amri's maternal half-brother, was killed by a group of Beja. He demanded that his allies, Rabi'a, avenge him. Mudar agreed and preferred life, as opposed to the Banu Hilal and Banu Tamim. Finally, Al-Amri, with a group of his supporters, managed to defeat them. However, they did not live long, as he was assassinated by a Mudar slave named Yan.

We would not be exaggerating if we said that Al-Amri had nearly succeeded in establishing the first Arab emirate in northern Sudan. His success served as an example for many Arabs and those wishing to migrate to follow his lead. Al-Ya'qubi mentioned in his book "Al-Buldan" that twenty years after Al-Amri's death, Arab and Islamic activity increased in the land of metal. This activity included mining, Islamic da'wah, trade, and the transport of provisions. After Al-Amri's death, many successors from Rabi'a and Juhayna, especially around Aswan, vied for possession of the gold mines in Al-Khilafi. However, the advantage went to a group from Rabi'a north of the Beja, where they married the daughters of their leaders.

Abu Abd al-Rahman Abdullah bin Abd al-Hamid Al-Amri, who was named Al-Amri due to his lineage to Umar ibn al-Khattab (may God be pleased with him), is said to be from his descendants. He was born in Medina and came to Fustat, where he worked as a Hadith scholar. He then moved to Qayrawan, where he received news of the Beja's aggression against Muslims in Egypt and the killing during Eid prayers. He left, angered by God Almighty and the Muslims, seeking revenge against those who had raided the lands of Islam. News of the gold and trade in the rich Nubian mines also attracted him. He returned to Egypt quickly and headed to Wadi Al-Alaqi, where he transformed from a jurist to a merchant. A large number of Arabs gathered around him, strengthening his influence. He roamed and traveled in the lands of the Beja and Nubia, and the Arabs turned their attention to him. Thus, Al-Amri became a pioneer of Arab-Islamic culture in those lands. Al-Amri, therefore, is a unique religious figure who spread Islam and Arab-Islamic culture through his conquests in the lands of the Beja and Nubia.