In the Arab lands and for economic reasons, they searched for gold mines and trade in the products of those regions. This was done slowly and easily over successive generations.

It is inevitable that these migrations would eventually lead to integration into the lives of the local inhabitants, who belonged to multiple elements such as Hamitic and Negro. The same applies to the culture they brought with them to their new homes; it became a collection of cultures prevalent in the local environments.

Al-Amri's activities expanded to encompass his state, covering most of Lower Nubia from Shingir in the south to Aswan in the north, and from the Nile River in the west to the Red Sea in the east. From here, Al-Amri established an Arab Islamic principality in Nubia under his leadership in Sudan.

What indicates Al-Amri's good intentions and his mission to spread Islam and Islamic culture in those northern regions is that we find that the two youths who killed Al-Amri came to Ahmad ibn Tulun, the ruler of Egypt, claiming to be servants of Al-Amri in the mining region and bringing Al-Amri's head. This was in pursuit of favor. Ahmad ibn Tulun summoned a group of people from Upper Egypt who knew Al-Amri well to verify if it was Al-Amri's head. After examining it, they confirmed it was his head. At that point, Ibn Tulun brought the two youths and asked them, "Was your master a Christian?" They replied, "No." He asked, "Did he prevent you from your livelihood?" They replied, "No." He asked, "What did you do in your presence that made you deem his killing permissible?" They replied, "No." He then asked, "When you killed him, why?" They said, "Because we desired favor with the prince and closeness to him." He said, "By God, that will make you farther from me than from God Almighty." Then Ahmad ibn Tulun ordered their necks to be struck and their bodies to be crucified. He then ordered Al-Amri's head to be washed, perfumed, wrapped in a shroud, and buried.

Here, Al-Amri's campaign was the beginning of extensive and repeated Arab campaigns against the homelands of the Beja, providing an opportunity for the Arabs to become acquainted with