Psalms 136:14 Midrash

וְהֶעֱבִ֣יר יִשְׂרָאֵ֣ל בְּתוֹכ֑וֹ כִּ֖י לְעוֹלָ֣ם חַסְדּֽוֹ׃

And made Israel to pass through the midst of it, For His mercy endureth for ever;