'Do not extend the greeting of peace ... and to those who drink alcohol, nor to chess and dice players, nor to an effeminate person, nor to a poet who slanders chaste women of fornication, and nor to someone performing his prayer and that is because the person praying cannot return the greeting, for verily the initiation of the greeting on the part of the greeter is voluntary whereas returning the greeting is obligatory. Nor [greet] the usurer, nor someone who is sitting in the lavatory, nor someone taking a bath, and nor an outrightly corrupt person who openly commits immoral acts.'