Whoever believes in Allah and the Last Day should not enter the bathhouse except with a waistcloth." One day, he entered the bathhouse and applied lime paste. When the paste covered his body, he removed the waistcloth. His servant said to him, "May my father and mother be your ransom, you advise us to keep the waistcloth, but you have removed it yourself?" He replied, "Don't you know that the lime paste has covered the private parts?"