Musnad Ahmad 27:1364

Abu Mu'awiyah al-Ghalabi narrated to us, Khalid ibn al-Harith narrated to us, Muhammad ibn 'Ajlan narrated to us, from Nafi', from Abdullah ibn Umar: "The Messenger of Allah (peace and blessings of Allah be upon him) camped at al-'Aqiq, and he forbade approaching women on the night he arrived. Two young men disobeyed him, and both of them saw what they disliked."