The biographies of the Sahabah contain the history of men who accepted the invitation of Islam when it was presented to them. Their hearts testified to its truth and all they said when they were called towards Allaah and His Rasool SAW was, "Our Rabb, we have certainly heard the caller (Rasulullaah SAW) calling to Imaan (saying), 'Believe in your Rabb!' so we believedN(').They placed'their hands in the hands of Rasurullaah SAW and it became easy for them to sacrifice their lives, their wealth and their families.