Narrated Abu Hurairah (RA):

The Prophet (ﷺ) said: "Allah, the Most High, has forgiven my followers what they contemplate on within themselves (i.e. evil thoughts) as long as they do not act upon or speak about them." [Agreed upon].

وَعَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- عَنِ اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-قَالَ : { إِنَّ اَللَّهَ تَجَاوَزَ عَنْ أُمَّتِي مَا حَدَّثَتْ بِهِ أَنْفُسَهَا , مَا لَمْ تَعْمَلْ أَوْ تَكَلَّمْ } مُتَّفَقٌ عَلَيْهِ [1]‏ .‏