Indeed, this Qur'an which was sent down to Muhammad is surely a Qur'an great in benefits, many in good, abundant in knowledge, in a preserved Book hidden from the eyes of the creatures, which is the Book in the hands of the angels. None touches the Qur'an except the noble angels whom Allah purified from calamities and sins, and none touches it also except the ones purified from polytheism, major impurity, and minor ritual impurity.