וַיָּרֵ֧עוּ אֹתָ֛נוּ הַמִּצְרִ֖ים וַיְעַנּ֑וּנוּ וַיִּתְּנ֥וּ עָלֵ֖ינוּ עֲבֹדָ֥ה קָשָֽׁה׃
And the Egyptians dealt ill with us, and afflicted us, and laid upon us hard bondage.
Read kabbalistic (mystical) interpretation of Deuteronomy 26:6: and classical mystical sources.