אָ֭דָם לַהֶ֣בֶל דָּמָ֑ה יָ֝מָ֗יו כְּצֵ֣ל עוֹבֵֽר׃
אַ מענטש איז געגליכן צו אַ הױך, זײַנע טעג זײַנען װי אַ שאָטן װאָס פֿאַרגײט.
Rashi
his days are as a fleeting shadow Solomon said (Ecc. 6:12): “that he do them like a shadow,” but he did not explain whether [this refers to] the shadow of a palm or the shadow of a wall, which are permanent. His father already explained, “as a fleeting shadow,” the shadow of a flying bird.