"In the name of Allah, the Most Merciful, the Bestower of Mercy

From Muhammad, son of Abdullah to Heraclius the Leader of the Romans:

Peace be upon he who follows the guidance.

Furthermore, I invite you with the invitation of peace. If you establish peace- you will find peace, Allah will give your reward in double. If you turn away, you will bear the sin of the Arians.

"Say, 'O People of the Scripture, come to a word that is equitable between us and you - that we will not worship except Allah and not associate anything with Him and not take one another as lords instead of Allah .' But if they turn away, then say, 'Bear witness that we are Muslims [submitting to Him].' (Quran 3:64)