King James Version (KJV)
Thou didst divide the sea by thy strength: thou brakest the heads of the dragons in the waters.
Modern English
You divided the sea by your might; you broke the heads of the sea monsters on the waters.
Hebrew
אַתָּ֣ה פוֹרַ֣רְתָּ בְעָזְּךָ֣ יָ֑ם שִׁ֝בַּ֗רְתָּ רָאשֵׁ֥י תַנִּינִ֗ים עַל הַמָּֽיִם׃
ʾatah pvorarta bʿazka yam shibarta raʾshey taniyniym ʿal hamayim