Q: What is the ruling on saying, "By the Lord of the Mushaf?"

Swearing by "the Lord of theaf" is not permissible because the Mus'haf (copy of the Qur’an) contains both the uncreated speech of Allah and created elements such as paper and ink. This makes the phrase ambiguous and problematic. One should swear by "the Qur’an" or "by my Lord." Swearing by the Mus'haf constitutes a binding oath that necessitates expiation if broken. This indicates that the Qur’an is uncreated, therefore, it is not correct to append "Lord" to it.