וּבְנֵיהֶ֞ם אֲשֶׁ֣ר לֹֽא־יָדְע֗וּ יִשְׁמְעוּ֙ וְלָ֣מְד֔וּ לְיִרְאָ֖ה אֶת־יְהוָ֣ה אֱלֹהֵיכֶ֑ם כָּל־הַיָּמִ֗ים אֲשֶׁ֨ר אַתֶּ֤ם חַיִּים֙ עַל־הָ֣אֲדָמָ֔ה אֲשֶׁ֨ר אַתֶּ֜ם עֹבְרִ֧ים אֶת־הַיַּרְדֵּ֛ן שָׁ֖מָּה לְרִשְׁתָּֽהּ׃ (פ)
and that their children, who have not known, may hear, and learn to fear the LORD your God, as long as ye live in the land whither ye go over the Jordan to possess it.’
Read kabbalistic (mystical) interpretation of Deuteronomy 31:13: and classical mystical sources.