أَمْ يَقُولُونَ افْتَرَىٰ عَلَى اللَّهِ كَذِبًا ۖ فَإِن يَشَإِ اللَّهُ يَخْتِمْ عَلَىٰ قَلْبِكَ ۗ وَيَمْحُ اللَّهُ الْبَاطِلَ وَيُحِقُّ الْحَقَّ بِكَلِمَاتِهِ ۚ إِنَّهُ عَلِيمٌ بِذَاتِ الصُّدُورِ ٢٤

Do they say that this (Messenger [blessings and peace be upon him]) has invented a lie against Allah? So if Allah wills, He may set a seal (of patience and steadfastness) on your holy heart (so that their absurd talk may not hurt you). And Allah eliminates falsehood and maintains the truth established by His Words. Surely, He knows best the secrets of the breasts. (42:24)