﴿ قُلْ نَزَّلَهُۥ رُوحُ ٱلْقُدُسِ مِن رَّبِّكَ بِٱلْحَقِّ لِيُثَبِّتَ ٱلَّذِينَ ءَامَنُوا۟ وَهُدًۭى وَبُشْرَىٰ لِلْمُسْلِمِينَ ﴾

“Say: "Holy inspiration has brought it down from thy Sustainer by stages, setting forth the truth, so that it might give firmness unto those who have attained to faith, and provide guidance and a glad tiding unto all who have surrendered themselves to God."”

(And when We put a revelation in place of (another) revelation�) [16:101-102]. This verse was revealed when the idolaters said: �Muhammad is mocking his Companions; one day he commands them to do something and the next day he forbids them from doing it, or brings instead something which is easier. He is nothing but a calumniator who says things of his own invention�, and so Allah, exalted is He, revealed this verse and the verse after it.