Social Justice in Islam
1. In ancient times, it was unthinkable for a girl of noble birth or even of any free person, to be married to a slave. The Prophet, wishing to break with this tradition, decided to arrange a marriage between his own first cousin, Zaynab bint Jahash (d. 20 AH), who belonged to the Banu Hashim, the most respectable clan of the Quraysh tribe, and Zayd ibn Haritha, a black Negro slave. This most extraordinary event served as an important example of Islamic justice. 2. The Ka'aba, the most holy place of worship, was considered sacrosanct in all its parts. Therefore, when the call to prayer had to be made from its roof, it was only a person of noble birth who could ascend it. A man of lowly birth performing this religious duty was not be countenanced. After the conquest of Mecca, the Prophet broke with this tradition by asking a Negro slave, Bilal ibn Rubah to go up on to the roof of the Ka'aba and give the call to prayer (Azan).