The next year, being the thirteenth of the mission (A.D. 622) Musab returned from Yathrib accompanied by seventy-three men and two women of that city who had adopted Islam, besides others who were as yet unbelievers. On their arrival, these Yathribites immediately sent to the Prophet and invited him to their city. The Prophet was now in great need of such assistance, for his opponents had by this time grown so powerful in Mecca that he could not stay there much longer without imminent danger. He therefore accepted their proposal and met them one night by appointment at Al-Aqaba attended by his uncle Al Abbas, who, though he was not then a convert, wished his nephew well.
Al Abbas made a speech to those of Yathrib wherein he told them that, as the Prophet Muhammad was obliged to quit his native city and seek shelter elsewhere, and they had offered him their protection, they would do well not to deceive him; and that if they were not firmly resolved to defend and not to betray him, they had better declare their minds and let him provide for his safety in some other manner. Upon their professing their sincerity, the Prophet swore to be faithful to them, on condition that they should worship none but Allah observe the precepts of Islam, obey the Prophet in all that was right, and protect him against all insults as heartily as they would their wives and families. They then asked him what would be their return, if they should happen to be killed in the cause of Allah; he answered:' "Paradise," whereupon they pledged their faith to him and his cause.
The Prophet then selected twelve men out of their number to act as his delegates. Thus was concluded the second covenant of Al Aqaba. The Yathribites returned home leaving the Prophet to arrange for the journey to their city. The Prophet directed his followers to seek immediate safety at Yathrib, which they accordingly did. About one hundred families silently disappeared from Mecca and proceded to Yathrib, where they were received with enthusiasm and much hospitality. Finally, all the disciples had gone to Yathrib. The Prophet alone remained at Mecca, keeping with him only his young cousin Ali, and his devoted friend Abu Bakr.