Hazrat Hasan bin Muhammad bin Ali (may Allah be pleased with him, may Allah have mercy on him) narrates that the Messenger of Allah (peace and blessings be upon him) wrote a letter to the Magians of Hajar and invited them to Islam. Whoever accepted Islam, the Prophet (peace and blessings be upon him) accepted his Islam. And whoever refused, the Prophet (peace and blessings be upon him) imposed jizya upon him with the conditions that their slaughtered animals would not be eaten and their women would not be married.