The Arabian Nights Entertainments

The central core of the stories concerns a Persian king and his new bride. The king has a brother who is a vizier in faraway Samarcand, and he invites him to come to the palace for a visit. Just before his departure, the vizier is shocked to discover his wife's infidelity. Enraged, he kills her. Full of pain and grief, the vizier continues on to the court of his brother, the king. But, once arrived at his brother's palace, the vizier soon discovers the king's wife is also involved in an even more flagrant infidelity, which he reluctantly reports to him.