Reference for Psalms 78:39

וַ֭יִּזְכֹּר כִּי־בָשָׂ֣ר הֵ֑מָּה ר֥וּחַ ה֝וֹלֵ֗ךְ וְלֹ֣א יָשֽׁוּב׃

So He remembered that they were but flesh, A wind that passeth away, and cometh not again.