DEUT1416 It is a negative commandment not to strike one's father or mother since Scripture states, And he that strikes his father or his mother shall surely be put to death (Sh'moth 21:15). The admonition against it derives from the verse, he may not add more [this verse] … If a person inflicted a wound on his father or his mother, and there were witnesses and a [prior] warning, his execution should be by strangulation. If he struck him [his father] on the ear and deafened him, he would deserve death, since it is impossible that a drop of blood was not shed within. If he struck him without inflicting a wound, he is punishable as for [striking] any other Jew. If someone struck his father or his mother after their death, he is free of penalty. It is forbidden to do bloodletting [for reasons of health] on one's own father or mother [and so, of course, surgery]. If there is no other physician there, he is to do as they order him.