כָּל־הַיָּדַ֖יִם תִּרְפֶּ֑ינָה וְכָל־בִּרְכַּ֖יִם תֵּלַ֥כְנָה מָּֽיִם׃
אַלע הענט װעלן שלאַף װערן, און אַלע קני װעלן רינען מיט װאַסער.
Rashi
Let them be rejected by themselves, that they will be rejected in their own eyes from worry, and as [if] in water let them walk. Similar to this is (Ezek. 7:17): “and all knees will go [as in] water,” from tears.