Musnad Abu Ya'la al-Mawsili 129:144

And from Anas, he said: The Messenger of Allah (may Allah bless him and grant him peace) held a wedding feast for Zaynab, and he fed the Muslims until they were full with bread and meat. Then he went out as he used to do when he married, so he would come to the chambers of the Mothers of the Believers, and he would greet them and pray for them, and they would greet him and pray for him. Then he returned, and behold, there were two men in the house who had been engaged in conversation. When the Messenger of Allah (may Allah bless him and grant him peace) saw them, he turned back. When the two men saw that, they jumped up in alarm and left. I do not know whether I informed him or someone else did, so the Messenger of Allah (may Allah bless him and grant him peace) returned.