Musnad Ahmad 1153:820

Muhammad ibn Kunasa al-Asadi Abu Yahya narrated to us, he said: Ishaq ibn Sa'id narrated to us, from his father, he said: It reached me that Aisha said: "I did not eavesdrop on the Messenger of Allah, may Allah bless him and grant him peace, except once. For Uthman came to him at the peak of midday, and I thought that he had come to him regarding a matter of women, so jealousy compelled me to listen to him. I heard him saying: 'Indeed, Allah the Almighty will clothe you in a shirt, and my nation will want you to take it off, so do not take it off.' When I saw Uthman giving them what they asked of him, except for taking it off, I knew that it was from the covenant of the Messenger of Allah, may Allah bless him and grant him peace, which he had covenanted to him."