Allah swears to the Greatness of the Qur'an

The usage of La (in Fala) is not an extra character without meaning, as some of the scholars of Tafsir say. Rather it is used at the beginning of an oath when the oath is a negation. This is like when `A'ishah, may Allah be pleased with her said, "La by Allah! Allah's Messenger ﷺ did not touch any woman's hand at all. So in this way, the meaning is, "No! I swear by the Mawaqi` of the stars. The matter is not as you people claim - about the Qur'an - that it is a result of magic or sorcery, rather it is an Honorable Qur'an." Ibn Jarir said, "Some of the scholars of the Arabic language said that the meaning of:

فَلاَ أُقْسِمُ

أَفَبِهَـٰذَا الْحَدِيثِ أَنتُم مُّدْهِنُونَ (Is it this discourse that you take lightly,...56:81) The word mudhinun is the plural of mudhin, being the active participle from اِذھَان idhan, which literally means 'to apply or rub oil on the body'. When oil is applied or rubbed on the body, the muscles are relaxed, and parts of the body become soft and supple. By extension, the word is employed in the sense of showing flexibility and softness on inappropriate occasions. Hence, it is used in the sense of hypocrisy.