Messenger of Allah ﷺ 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."  

قَالَ رَسُولُ اللَّهِ ﷺ: «اللَّهُ أَفْرَحُ بِتَوْبَةِ عَبْدِهِ مِنْ أَحَدِكُمْ سَقَطَ عَلَى بَعِيرِهِ وَقَدْ أَضَلَّهُ فِي أَرْضِ فَلاَةٍ۔»  

the Messenger of Allah ﷺ said, "Verily, Allah is more pleased with the repentance of a servant as he turns towards Him for repentance than this: that one amongst you is upon the camel in a waterless desert and there is upon it his provision of food and drink also and it is lost by him. He having lost all hope lies down in the shadow and is disappointed about his camel and there he finds that camel standing before him. He takes hold of his nose string and then out of boundless joy says: O Lord, You are my servant and I am your Lord. He commits this mistake out of extreme delight."  

قَالَ رَسُولُ اللَّهِ ﷺ «لَلَّهُ أَشَدُّ فَرَحًا بِتَوْبَةِ عَبْدِهِ حِينَ يَتُوبُ إِلَيْهِ مِنْ أَحَدِكُمْ: كَانَ عَلَى رَاحِلَتِهِ بِأَرْضِ فَلاَةٍ فَانْفَلَتَتْ مِنْهُ، وَعَلَيْهَا طَعَامُهُ وَشَرَابُهُ فَأَيِسَ مِنْهَا۔ فَأَتَى شَجَرَةً فَاضْطَجَعَ فِي ظِلِّهَا قَدْ أَيِسَ مِنْ رَاحِلَتِهِ۔ فَبَيْنَا هُوَ كَذَلِكَ إِذَا هُوَ بِهَا قَائِمَةً عِنْدَهُ، فَأَخَذَ بِخِطَامِهَا ثُمَّ قَالَ مِنْ شِدَّةِ الْفَرَحِ: اللَّهُمَّ أَنْتَ عَبْدِي وَأَنَا رَبُّكَ! أَخْطَأَ مِنْ شِدَّةِ الْفَرَحِ۔»