Over the centuries of Islamic history, Muslim rulers, Islamic scholars, and ordinary Muslims have held many different attitudes towards other religions. Attitudes have varied according to time, place and circumstance. Non-Muslims and Islam The Qur'an distinguishes between the monotheistic People of the Book (), i.e. Jews, Christians, Sabians and others on the one hand and polytheists or idolaters on the other hand. There are certain kinds of restrictions that apply to polytheists but not to "People of the Book" in classical Islamic law. One example is that Muslim males are allowed to marry a Christian or Jew, but not a polytheist. Muslim women, however, may not marry non-Muslim men. The Quran told Muslims to discuss the common points between Muslims and non-Muslims. It directs Muslims not to fight with people of the Book. The idea of Islamic infallibility is encapsulated in the formula, "Islam is exalted and nothing is exalted above it." Abraham, Moses, Hebrew prophets, and Jesus were all prophets of Islam, but according to Muslim tradition their message and the texts of the Torah and the Gospels were corrupted. Apostasy in Islam can be punishable by death and/or imprisonment according to some interpretations but they are only found in hadiths and there is nothing in the Quran that commands death penalty for apostate so the issue of apostasy is controversial. W. Heffening states that Shafi'is interpret verse as adducing the main evidence for the death penalty in Qur'an. Wael Hallaq states the death penalty was a new element added later and "reflects a later reality and does not stand in accord with the deeds of the Prophet." He further states that "nothing in the law governing apostate and apostasy derives from the letter of the holy text." There are also interpretations according to which apostates are not executed nor punished, and there is freedom of religion. In the 7th century text Concerning Heresy, the Christian scholar John of Damascus named Islam as Christological heresy, referring to it as the "heresy of the Ishmaelites". The position has remained popular in Christian circles well into the 20th century, by theologians such as the Congregationalist cleric Frank Hugh Foster and the Roman Catholic historian Hilaire Belloc, the latter of who described it as "the great and enduring heresy of Mohammed." Early Muslim practice During the thirteen years that Muhammad led his followers against Mecca and then against the other Arab tribes,