Solomon
Proverbs 17:21KJV·traditional attribution

He that begetteth a fool doeth it to his sorrow: and the father of a fool hath no joy.

Matthew Henry Presbyterian

This expresses that very emphatically which many wise and good men feel very sensibly, what a grievous vexatious thing it is to have a foolish wicked child. See here, 1. How uncertain all our creature-comforts are, so that we are often not only disappointed in them, but that proves the greatest cross in which we promised ourselves most satisfaction.

John Gill Reformed Baptist

He that begetteth a fool doth it to his sorrow,.... As it proves in the issue; though it was joy to him when a man child was born, and took delight in him while in infancy and childhood, and promised himself much happiness in him when at years of discretion; but, instead of that, he departs from his education principles, despises all parental counsels and...

Jamieson-Fausset-Brown Reformed

(Compare Pro 23:24). Different words are rendered by "fool," both denoting stupidity and impiety.