בְּ֭כֹחוֹ רָגַ֣ע הַיָּ֑ם ובתובנתו [וּ֝בִתְבוּנָת֗וֹ] מָ֣חַץ רָֽהַב׃
He stirreth up the sea with His power, And by His understanding He smiteth through Rahab.
Rashi on Job
the sea wrinkled Like (above 7:5), “my skin wrinkled.” Many wrinkles were formed. (So, when He said (Gen. 1:9), “Let the waters...gather,” they were gathered from their straightness and were wrinkled into many wrinkles) until they gathered into one place, which was prepared for them.