Proverbios 17
Brenton's English Septuagint
21and the heart of a fool is grief to its possessor. A father rejoices not over an uninstructed son; but a wise son gladdens his mother.
Reina-Valera 1909
21El que engendra al necio, para su tristeza lo engendra: y el padre del fatuo no se alegrará.
King James Version
21He that begetteth a fool doeth it to his sorrow: and the father of a fool hath no joy.
World English Bible
21He who becomes the father of a fool grieves. The father of a fool has no joy.