וְכַאֲשֶׁר֙ יְעַנּ֣וּ אֹת֔וֹ כֵּ֥ן יִרְבֶּ֖ה וְכֵ֣ן יִפְרֹ֑ץ וַיָּקֻ֕צוּ מִפְּנֵ֖י בְּנֵ֥י יִשְׂרָאֵֽל׃
But the more they afflicted them, the more they multiplied and the more they spread abroad. And they were adread because of the children of Israel.
Read kabbalistic (mystical) interpretation of Exodus 1:12: and classical mystical sources.