Abu Bakr had a slave who used to give him some of his earnings. Abu Bakr used to eat from it. Oneday he brought something and Abu Bakr ate from it. The slave said to him, "Do you know what thisis?" Abu Bakr then enquired, "What is it?" The slave said, "Once, in the pre-Islamic period ofignorance I foretold somebody's future though I did not know this knowledge of foretelling but I,cheated him, and when he met me, he gave me something for that service, and that is what you haveeaten from." Then Abu Bakr put his hand in his mouth and vomited whatever was present in hisstomach.