Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
muslim:2675i – ʿAbdullāh b. Maslamah b. Qaʿnab al-Qaʿnabī > al-Mughīrah / Ibn ʿAbd al-Raḥman al-Ḥizāmī > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

Allah is more pleased with the repentance of His servant when he turns penitently towards Him than one of you would be on finding the lost camel.  

مسلم:٢٦٧٥i – حَدَّثَنِي عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ الْقَعْنَبِيُّ حَدَّثَنَا الْمُغِيرَةُ يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْحِزَامِيَّ عَنْ أَبِي الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ لَلَّهُ أَشَدُّ فَرَحًا بِتَوْبَةِ أَحَدِكُمْ مِنْ أَحَدِكُمْ بِضَالَّتِهِ إِذَا وَجَدَهَا  

See similar narrations below:

Collected by Ibn Mājah, Suyūṭī
ibnmajah:4247 – Abū Bakr b. Abū Shaybah > Shabābah > And Rqāʾ > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

“Allah rejoiced more over the repentance of anyone of you, then you rejoice over your lost animal when you find it.”  

ابن ماجة:٤٢٤٧ – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا شَبَابَةُ حَدَّثَنَا وَرْقَاءُ عَنْ أَبِي الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ اللَّهَ ﷻ أَفْرَحُ بِتَوْبَةِ أَحَدِكُمْ مِنْهُ بِضَالَّتِهِ إِذَا وَجَدَهَا