Rashi on Psalms
The sons of men are but vanity Do not fear them, since God is forever our shelter in time of trouble.
Rashi on Psalms
were they to be put on a scale If they came to go up on a scale, they and their vanities would be equal. This is the simple meaning, but midrashically, it is interpreted as concerning couples (Lev. Rabbah 29:8).