Jamieson, Fausset and Brown on 1 Samuel 20:30

30. Thou son of the perverse rebellious woman--This is a striking Oriental form of abuse. Saul was not angry with his wife; it was the son alone, upon whom he meant, by this style of address, to discharge his resentment. The principle on which it is founded seems to be, that to a genuine filial instinct it is a more inexpiable offense to hear the name or character of a parent traduced, than any personal reproach. This was, undoubtedly, one cause of "the fierce anger" in which the high-minded prince left the table without tasting a morsel.