Sayyiduna Anas (may Allah be pleased with him) narrates: Sayyiduna Jibreel (peace be upon him) came to the Prophet Muhammad (peace and blessings be upon him) (this was during the childhood of the Prophet Muhammad, peace and blessings be upon him) while the Prophet Muhammad (peace and blessings be upon him) was playing with other children. Sayyiduna Jibreel (peace be upon him) took hold of the Prophet Muhammad (peace and blessings be upon him), laid him down, and split open his blessed chest. He took out a clot from it and said: "This was the portion of Satan within you." Then he washed his blessed heart with Zamzam water in a basin made of gold and then returned it to its place. The children ran to the mother of the Prophet Muhammad (peace and blessings be upon him), meaning his wet nurse, and said: "Muhammad (peace and blessings be upon him) has been killed." They came to the Prophet Muhammad (peace and blessings be upon him) and found that the color of his face had changed. Sayyiduna Anas (may Allah be pleased with him) narrates: I saw the mark of that incision on the blessed chest of the Prophet Muhammad (peace and blessings be upon him).