Reference for Psalms 104:29

תַּסְתִּ֥יר פָּנֶיךָ֮ יִֽבָּהֵ֫ל֥וּן תֹּסֵ֣ף ר֭וּחָם יִגְוָע֑וּן וְֽאֶל־עֲפָרָ֥ם יְשׁוּבֽוּן׃

Thou hidest Thy face, they vanish; Thou withdrawest their breath, they perish, And return to their dust.

ספר השרשים