Devarim 8:16

הַמַּאֲכִ֨לְךָ֥ מָן֙ בַּמִּדְבָּ֔ר אֲשֶׁ֥ר לֹא־יָדְע֖וּן אֲבֹתֶ֑יךָ לְמַ֣עַן עַנֹּֽתְךָ֗ וּלְמַ֙עַן֙ נַסֹּתֶ֔ךָ לְהֵיטִֽבְךָ֖ בְּאַחֲרִיתֶֽךָ׃

who fed thee in the wilderness with manna, which thy fathers knew not, that he might afflict thee, and that he might prove thee, to do thee good at thy latter end;