It is reported that Amir al-Mu’minin `Ali—may Allah exalt his esteem—called at a slave but he did not take heed. Again, the Imam called at him and the slave took no heed. The Imam called him again but he took no notice. Rising up from his place, `Ali saw him lying down. So he said, “Did you not hear me?” He said, “I heard you.” The Imam said, “So why didn’t you come?” The slave said, “Such a noble man as you are, I knew I was free from punishment, so I was lazy.” The Imam said, “I set you free for the sake of Allah, the Honored and Glorified.” (Al-Risalah al-Qushayriyyah: 394.)