וּפֵרַ֤שׂ יָדָיו֙ בְּקִרְבּ֔וֹ כַּאֲשֶׁ֛ר יְפָרֵ֥שׂ הַשֹּׂחֶ֖ה לִשְׂח֑וֹת וְהִשְׁפִּיל֙ גַּֽאֲוָת֔וֹ עִ֖ם אָרְבּ֥וֹת יָדָֽיו׃
And when he shall spread forth his hands in the midst thereof, As he that swimmeth spreadeth forth his hands to swim, His pride shall be brought down together with the cunning of his hands.
Rashi on Isaiah
And he shall spread out his hands (וּפֵרַשׂ) He shall break his hands and his arms by clapping his hands in weeping.
Ibn Ezra on Isaiah
And he shall spread forth. The Lord shall spread forth. In the midst of them. In the midst of Moab.