יְהִֽי־מְקוֹרְךָ֥ בָר֑וּךְ וּ֝שְׂמַ֗ח מֵאֵ֥שֶׁת נְעוּרֶֽךָ׃
Let thy fountain be blessed; And have joy of the wife of thy youth.
Rashi on Proverbs
Your fountain shall be blessed, and you shall rejoice with the wife of your youth That is the Torah which you learned in your youth.