Solomon
Proverbs 14:13ESV·traditional attribution

Even in laughter the heart may ache, and the end of joy may be grief.

Matthew Henry Presbyterian @wholebiblehenry

This shows the vanity of carnal mirth, and proves what Solomon said of laughter, that it is mad; for, 1. There is sadness under it. Sometimes when sinners are under convictions, or some great trouble, they dissemble their grief by a forced mirth, and put a good face on it, because they will not seem to yield: they cry not when he binds them.

John Gill Reformed Baptist @doctorgill

Even in laughter the heart is sorrowful,.... As Belshazzar's was in the midst of his feast and jollity, when he saw the writing on the wall; so sin may stare a man in the face, and guilt load his conscience and fill him with sorrow, amidst his merriment; a man may put on a merry countenance, and feign a laugh, when his heart is very...

Jamieson-Fausset-Brown Reformed @jfbcommentary

The preceding sentiment illustrated by the disappointments of a wicked or untimely joy.