It is narrated from Suddi (may Allah have mercy on him): He used to swear that the price for which Sayyiduna Yusuf (peace be upon him) was bought was twenty-two dirhams, and Sufyan (may Allah have mercy on him) said: "Al-Bakhs" means that the deficiency refers to unlawful transactions.
Hadith Referenceسنن سعید بن منصور / كتاب التفسير / 1112