The Prophet ﷺ said, "Allah rejoices more at the repentance of one of you than you would at finding your lost camel."
حدثنا أبو بكر بن أبي شيبة حدثنا شبابة حدثنا ورقاء عن أبي الزناد عن الأعرج
عن النبي ﷺ قال إن الله عز وجل أفرح بتوبة أحدكم منه بضالته إذا وجدها
Reported by Muslim, Tawbah, chapter on encouragement to repent and rejoicing in it, hadith 2/2675, after hadith 2743 and before hadith 2744, from the hadith of Abu Zinad, through him. The hadith has many paths of transmission in Bukhari and Muslim and elsewhere.