1,010. Injuring One's Parents
143:14 Whoever shames his father or mother, even if through words or even by a mere hint, is included among those who are cursed by G-d as per Deuteronomy 27:26, "Cursed be the one who disgraces his father or his mother."
143:15 If a thorn is stuck in one's father or mother, he should not be the one to remove it, out of concern that he cause a wound, which is a capital offense. Similarly, if the son is a doctor, he shouldn't be the one to take blood or perform an amputation, even though the purpose is medical treatment. This is only the case when there is someone else available to do it; if no one else is available and the parent is suffering, he may do what is medically necessary.