Sahih al-Bukhari, Book 80, Hadith 6 (In-Book) ⓘ
Narrated Anas bin Malik: Allah's Messenger said, "Allah is more pleased with the repentance of His slave than anyone of you is pleased with finding his camel which he had lost in the desert. "
حَدَّثَنَا إِسْحَاقُ، أَخْبَرَنَا حَبَّانُ، حَدَّثَنَا هَمَّامٌ، حَدَّثَنَا قَتَادَةُ، حَدَّثَنَا أَنَسُ بْنُ مَالِكٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم. وَحَدَّثَنَا هُدْبَةُ، حَدَّثَنَا هَمَّامٌ، حَدَّثَنَا قَتَادَةُ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " اللَّهُ أَفْرَحُ بِتَوْبَةِ عَبْدِهِ مِنْ أَحَدِكُمْ سَقَطَ عَلَى بَعِيرِهِ، وَقَدْ أَضَلَّهُ فِي أَرْضِ فَلاَةٍ " .
also referenced under: Hadith 6309 (DarusSalam) & Volume 8, Book 75, Hadith 321 (USC-MSA)