Narrated Muhammad bin `Ali: `Ali was told that Ibn `Abbas did not see any harm in the Mut'a marriage. `Ali said, Allah's Apostle forbade the Mut'a marriage on the Day of the battle of Khaibar and he forbade the eating of donkey's meat. Some people said, If one, by a tricky way, marries temporarily, his marriage is illegal. Others said, The marriage is valid but its condition is illegal.