Now, as we mentioned in that last video, what he was preaching did not sit well with his own tribe, those who ruled Mecca, the Quraysh. He was preaching a monotheistic tradition based on Judaism and Christianity. He was preaching that there is no god but God. But Mecca's power, its economy, was based on people making pilgrimages there to worship the idols at the Kaaba. So the Quraysh did not like Muhammad's revelations, and they did not like these early Muslims, and they persecuted them. They killed them, they tortured them. And we saw in 615, the migration of some of Muhammad's followers to Abyssinia, the kingdom of Aksum, modern-day Eritrea in Ethiopia, to escape some of that persecution.