Reference for Ketubot 165:9

אמר אביי נשואה ידו כידה רבא אמר ידו עדיפא מידה נפקא מינה לשומרת יבם

Abaye replied: In the case of a married woman the husband's rights have the same force as the wife's Rava said: His rights are superior to hers. What is the practical difference between their opinions? A woman who was awaiting the decision of the levir.

Jastrow