Tosefta for Psalms 136:13

לְגֹזֵ֣ר יַם־ס֭וּף לִגְזָרִ֑ים כִּ֖י לְעוֹלָ֣ם חַסְדּֽוֹ׃

To Him who divided the Red Sea in sunder, For His mercy endureth for ever;