"Allah is more joyful at the repentance of His servant than one of you who comes upon his camel, having lost it in a barren land."
Narrated from Anas ibn Mālik. Ṣaḥīḥ al-Bukhārī 6309 (Kitāb ad-Daʿawāt). This is the whole of the narration at this reference. Longer tellings of the same event — the man sleeping, waking to find the mount gone, then finding it again — are reported elsewhere, including Ṣaḥīḥ al-Bukhārī 6308 and Ṣaḥīḥ Muslim, in different words.
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In Tawbah: The Door That Doesn't Close
The hardest part for people to accept is not believing they will be forgiven. It is believing that Allah wants it.
The man in that image is not inconvenienced. He is in a desert, his water is gone, and he has lain down beneath a tree to die. He has passed through hope and come out the far side of it.
And then the camel is there.
Qur'anic Arabic is reproduced in the Uthmani script. Hadith Arabic is reproduced from the published collections named above. The English is a rendering informed by widely used translations, offered as an aid to meaning and not a substitute for the Arabic. Verify what is cited, and consult people of knowledge on anything affecting practice.