The Prophet (blessings and peace of Allah be upon him) used to send letters to the kings and rulers of the earth at his time, calling them to Islam, in the hope that they would accept guidance and so that their people would be guided through them, without war. In this hadith, ‘Abdullah ibn ‘Abbas narrates that our Messenger (blessings and peace of Allah be upon him) sent his letter with a man, namely ‘Abdullah ibn Hudhafah, and instructed him to give it to the ruler of Bahrain. The ruler or governor of Bahrain at that time was al-Mundhir ibn Sawi. Bahrain was a kingdom between Basrah and Oman which belonged to the Persian Empire. The ruler of Bahrain sent the letter to Khusraw, whose name was Pervez son of Hormuz. He read the letter, then he tore it up. When the Prophet (blessings and peace of Allah be upon him) came to know of that, he prayed against them, praying that Allah would tear them to pieces and cause them to be scattered, putting an end to their kingdom. Allah answered the prayer of His Prophet (blessings and peace of Allah be upon him). Only a few years later, the power of the Persians diminished completely throughout the land, and collapsed by virtue of the prayer of the Prophet (blessings and peace of Allah be upon him), and a final end was put to it during the caliphate of ‘Umar (may Allah be pleased with him). In this hadith, we see that we may call people to Islam verbally and in writing, and that writing may take the place of speaking. This hadith is also one of the signs of the truthfulness of the prophethood of our Prophet Muhammad (blessings and peace of Allah be upon him)..