אֲבָנִ֤ים ׀ שָׁ֥חֲקוּ מַ֗יִם תִּשְׁטֹֽף־סְפִיחֶ֥יהָ עֲפַר־אָ֑רֶץ וְתִקְוַ֖ת אֱנ֣וֹשׁ הֶאֱבַֽדְתָּ׃
水流磨損石頭，洪流沖去地上的塵土；你也這樣毀滅了人的指望。
Rashi
it washes away i.e., the flood. its aftergrowth of the stone, to be transformed into dust so that something should grow in it. As the aftergrowths of the harvest grow, so will the aftergrowths of this earth be transformed to stone.
Rashi
but the hope of man is not so, because as soon as he dies, it is lost forever.