"Has not the time arrived for the Believers that their hearts in all humility should engage in the remembrance of Allah and of the truth which has been revealed(to them), and that they should not become like those to whom was given the revelation aforetime, but long ages passed over them and their hearts grew hard? For many among them are rebellious transgressors." Holy Qur'an 57:16
Increase Your Knowledge of Islam Course Series
Hacene Chebbani & Ahmed Hersi
