הֲ֭בָאתָ עַד־נִבְכֵי־יָ֑ם וּבְחֵ֥קֶר תְּ֝ה֗וֹם הִתְהַלָּֽכְתָּ׃
Hast thou entered into the springs of the sea? Or hast thou walked in the recesses of the deep? .
Rashi on Job
the locks of the sea Heb. נבכי, like (Ex. 14:3), “They are trapped (נבכים) in the land.”