Is it permissible to swear by a surah of the Qur'an, such as "and the surah al-Kahf"? And is it permissible to say "and al-Kahf"?

Question:
He says: Honorable Shaykh, may Allah grant you success, is it permissible to swear by a surah of the Qur'an, such as "and the surah al-Kahf"? And is it permissible to say "and al-Kahf"?

Answer:
No, "and al-Kahf" is not permissible. I say "and the surah al-Kahf" or "a verse from the surah" by which he swears; there is nothing wrong with that, because the Qur'an is the speech of Allah, and His speech is one of His attributes, and the oath is made by Allah or by one of His attributes. Yes.