Grade 4 · IRE · History of Islam (Earliest Converts; Hijrah)
The earliest converts included Khadija, Abu Bakr, Ali and Zayd. The Quraysh persecuted Muslims, including Bilal. Some migrated to Abyssinia. In 622 CE the Prophet migrated to Madinah (Hijrah) with Abu Bakr and was welcomed by the Ansar. The Muslim calendar begins from the Hijrah.