EXOD420 It is a positive commandment to respect one's father and mother [this verse]. Now, what is the honor [meant here]? – One is to provide food and drink and clothing, out of the father's money. But if the father has no money and the son does, the son is compelled to sustain his father according to his means. And he is to attend upon them [his parents] in the way that a bondservant attends upon his master. He is to honor him [his father] even after his death. … Honoring one's father takes precedence over honoring his mother, since both he and his mother are obligated to honor his father.