Beur HaGra on Shulchan Arukh, Even HaEzer Siman 19
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
איש ואשה כו'. מהנ"ל ס"א:
אם הוחזקו. מגמרא דב"ב קס"ז ב':