יָדוֹ֙ נָטָ֣ה עַל־הַיָּ֔ם הִרְגִּ֖יז מַמְלָכ֑וֹת יְהוָה֙ צִוָּ֣ה אֶל־כְּנַ֔עַן לַשְׁמִ֖ד מָעֻזְנֶֽיהָ׃
He hath stretched out His hand over the sea, He hath shaken the kingdoms; The LORD hath given commandment concerning Canaan, To destroy the strongholds thereof;
Ibn Ezra on Isaiah
He stretched out His hand. God stretched out His hand, that is, He brought the punishment.
Rashi on Isaiah
the Lord commanded upon Canaan He commanded His summoned ones upon Canaan.