# designates her as a wife for his son

"decides that she is the one who will be his son's wife"

# he must not diminish her food, clothing, or her marital rights

This can be stated in a positive form. AT: "he must give the first wife the same food, clothing, and marital rights she had before" (See: [[rc://en/ta/man/translate/figs-doublenegatives]])

# must not diminish her food

"must not take away her food" or "must not give her less food"

# or her marital rights

This includes things that a husband must do for his wife, including sleeping with her. AT: "and he must continue to sleep with her as before" (See: [[rc://en/ta/man/translate/figs-euphemism]])