הֲ֭בָאתָ עַד־נִבְכֵי־יָ֑ם וּבְחֵ֥קֶר תְּ֝ה֗וֹם הִתְהַלָּֽכְתָּ׃
Pernahkah engkau masuk sampai ke relung-relung laut, atau berjalan menjelajahi kedalaman samudra raya?
Rashi
the locks of the sea Heb. נבכי, like (Ex. 14:3), “They are trapped (נבכים) in the land.”