It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) preferred the meat of the foreleg of a goat among the meat with bones, and it was the meat of the foreleg in which poison was mixed and given to the Prophet (peace and blessings of Allah be upon him) to eat, and the general belief was that it was the Jews who had mixed poison in the food of the Prophet (peace and blessings of Allah be upon him).