﴿ قَالُوا۟ جَزَٰٓؤُهُۥ مَن وُجِدَ فِى رَحْلِهِۦ فَهُوَ جَزَٰٓؤُهُۥ ۚ كَذَٰلِكَ نَجْزِى ٱلظَّٰلِمِينَ ﴾

“[The brothers] replied: "Its requital? He in whose camel-pack [the cup] is found-he shall be [enslaved as] a requital thereof! Thus do we [ourselves] requite the doers of [such] wrong.”

Please check ayah 12:76 for complete tafsir.