Our Master Muhammad [s] found Mus'ab the best man to carry out that task. Therefore, he ordered him to get ready to immigrate to al-Habasha.

Mus'ab bin Umair obeyed the Prophet [s] and went with his Muslim brothers to al-Habasha.

Thus, Mus'ab was the first to immigrate to Habasha for Allah. He stayed with Saad bin Zarara, who was among the earlier Muslims.

Days passed. Mus'ab was with his Muslim brothers teaching them Islam and reading them the Qur'an.