Solomon
Proverbs 19:18ESV·traditional attribution

Discipline your son, for there is hope; do not set your heart on putting him to death.

Matthew Henry Presbyterian @wholebiblehenry

Parents are here cautioned against a foolish indulgence of their children that are untoward and viciously inclined, and that discover such an ill temper of mind as is not likely to be cured but by severity. 1. Do not say that it is all in good time to correct them; no, as soon as ever there appears a corrupt disposition in them check it immediately...

John Gill Reformed Baptist @doctorgill

Chasten thy son while there is hope,.... Of guiding and keeping him in the right way, as long as corrections are or can be hoped to be of use; while in a state of infancy, childhood, and youth; while under parental government; and before habits in sin are grown strong, and the case become desperate, and he is hardened, and proof against all instruction and...

Jamieson-Fausset-Brown Reformed @jfbcommentary

(Compare Pro 13:24; Pro 23:13). let not . . . spare--literally, "do not lift up thy soul" (Psa 24:4; Psa 25:1), that is, do not desire to his death; a caution to passionate parents against angry chastisement.