Answer:
Tabuk, Saudi Arabia According to Ar-Rahīq al-Makhtum, a modern Islamic hagiography of Muhammad written by the Indian Muslim author Safi-ur-Rahman Mubarakpuri, the reason for war against the Byzantine Empire, was that one of Muhammad's ambassadors was killed by Sharhabeel bin 'Amr Al-Ghassani (the governor of Al-Balqa).
Step-by-step explanation: