לֵ֤ב חֲכָמִים֙ בְּבֵ֣ית אֵ֔בֶל וְלֵ֥ב כְּסִילִ֖ים בְּבֵ֥ית שִׂמְחָֽה׃
The heart of the wise is in the house of mourning; But the heart of fools is in the house of mirth.
Read midrashic interpretation of Ecclesiastes 7:4: and classical rabbinic exegesis.