זְכָר־אֲנִ֥י מֶה־חָ֑לֶד עַל־מַה־שָּׁ֝֗וְא בָּרָ֥אתָ כָל־בְּנֵי־אָדָֽם׃
O remember how short my time is; For what vanity hast Thou created all the children of men!
Rashi on Psalms
I am mindful what my old age is Heb. חלד. What old age do I have? Are not my days few? It should suffice You to punish me with my premature death.
Rashi on Psalms
for what futility Heb. שוא. For nothing and for vanity have You created all the sons of man?