משלי י:א פירוש: רש״י

Proverbs of Solomon: A wise son makes his father happy This is the Holy One, blessed be He (Midrash); another explanation: his actual father.

but a foolish son is the grief of his mother He is always with his mother at home, and she sees his foolishness and is troubled. And according to the allegory, a foolish son, like Jeroboam the son of Nebat,

is the grief of his mother, the grief of his nation.