My father asks me to pass the plate of cookies, but I know that his doctor instructed him to watch his sugar. If I don’t listen to my father, he becomes angry and says I am being disobedient. Must I listen to my father even though I know it is bad for him? | OU Kosher Certification
Sefer Chasidim (234) writes that even if a parent orders a child to bring food which endangers the parent and swears that they will otherwise never forgive the child, the child may still not bring their parents something which might endanger them. The Mahari Malcho (cited by the Birkei Yosef YD 240:15) deduces from the ...