Reference for Psalms 106:21

שָׁ֭כְחוּ אֵ֣ל מוֹשִׁיעָ֑ם עֹשֶׂ֖ה גְדֹל֣וֹת בְּמִצְרָֽיִם׃

They forgot God their saviour, Who had done great things in Egypt;

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