Responsa for Psalms 106:21

שָׁ֭כְחוּ אֵ֣ל מוֹשִׁיעָ֑ם עֹשֶׂ֖ה גְדֹל֣וֹת בְּמִצְרָֽיִם׃

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