In the fith year of Islaam as the tortures and hardships for the Messenger of Allah and his followers became worse, Rasulullah gave the Muslims permission to emigrate to the friendly country of Abyssinia. It was ruled by very good and trustworthy king called Negus (Najjashi), who later accepted Islaam. In the sixth year of Islaam Hazrat Hamza bin Abdul Muttalib(R.A.) (uncle of Rasulullah ) and Hazrat Umar bin Khattab (R.A.) became Muslims. By them accepting Islaam the Muslims became stronger and they started praying openly in the Ka'bah. The chiefs of the Quraish were shocked and they all joined forces to crush Islaam.
Contents of the biography of the Prophet Muhammed