RobH_en_tn/pro/05/18.md

May your fountain be blessed

The writer speaks of the son's wife as if she were a fountain. Here the word "blessed" refers to the sense of joy that the man has in his wife. AT: "May you always find joy with your wife" (See: rc://en/ta/man/translate/figs-metaphor)

the wife of your youth

Possible meanings are 1) "the wife whom you married when you were young" or 2) "your young wife."