Sahih Muslim
The Book of Marriage (Kitab Al-Nikah)
Book Number: 008 / Hadith Number: 3369
Abu Sa'id al-Khudri (Allah he pleased with him) reported that Allah's Messenger (may peace be upoin him) said: The most wicked among the people in the eye of Allah on the Day of judgment is the men who goes to his wife and she comes to him, and then he divulges her secret.