Targum zu Schemot 14:21

And Mosheh stretched out his hand over the sea, with the great and glorious rod which was created at the beginning, and on which were engraven and set forth the Great and Glorious Name, and the ten signs which had smitten the Mizraee, and the three fathers of the world, and the six mothers, and the twelve tribes of Jakob: and straightway the Lord brought a vehement east wind upon the sea all night, and made the sea dry; and divided the waters into twelve divisions according to the twelve tribes of Jacob.

And he stretched forth.