(6) باب الْخَطَإِ وَالنِّسْيَانِ فِي الْعَتَاقَةِ وَالطَّلاَقِ وَنَحْوِهِ، وَلاَ عَتَاقَةَ إِلاَّ لِوَجْهِ اللَّهِ
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Allah has accepted my invocation to forgive what whispers in the hearts of my followers, unless they put it to action or utter it." (See Hadith No. 657 Vol. 8)
Reference: Sahih al-Bukhari 2528
In-book reference: Book 49, Hadith 13
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 46, Hadith 705