Musnad Abu Ya'la al-Mawsili 150:430

Muhammad ibn Khalid ibn Abdullah narrated to us, Ibrahim narrated to us, from Salih ibn Kaysan, from Ibn Shihab, who said: And Aisha said: "By Allah, the man to whom it was said what was said, would say: 'Subhan Allah! By Allah, I have never uncovered the private parts of a female at all.'" She said: "Then he was killed after that in the way of Allah."