It is narrated from Hazrat Ali (may Allah be pleased with him) by Ibn Mudrik al-Nakha'i that a man bought a slave girl from another, and she did not have a molar tooth. He took the dispute to Hazrat Shurayh (may Allah have mercy on him). Hazrat Shurayh said: Present witnesses to prove that he sold you the slave girl without a molar tooth; otherwise, he will swear an oath that he sold her to you and she had a molar tooth.