THE BROTHERHOOD OF ISLAM
The first problem faced by the Prophet was that of the Makkan refugees. They had neither homes nor money. Most of them had been well-to-do in Makkah, but they had left everything behind. So the first important thing the Prophet had to do was settle them in their new surroundings.
The solution to this problem was found in the concept of brotherhood in Islam. The Prophet collected the Muslims and suggested that one Ansari Madinan Muslim and one refugee Makkan Muslim should become linked together as two brothers.
They immediately accepted the suggestion of the Prophet. Each Ansari took one Makkan Muslim as his brother. This bond between the two became even more powerful than a blood relationship. The Ansari gave his Makkan brother half of his possessions—house, land, money and other belongings.