Musnad Abu Ya'la al-Mawsili 16:1

Muhammad ibn Bakkar narrated to us, 'Ataf ibn Khalid narrated to us, my brother al-Miswar ibn Khalid narrated to me, from 'Ali ibn 'Abd Allah ibn Malik ibn Buhaynah, from his father 'Abd Allah, who said: While the Messenger of Allah (may Allah bless him and grant him peace) was sitting among his companions, he said, "May Allah bless that graveyard," three times. He said: We did not know which graveyard, and he did not name anything for them. He said: Some of the companions of the Messenger of Allah (may Allah bless him and grant him peace) entered upon some of the wives of the Prophet (may Allah bless him and grant him peace). 'Ataf said: I was told that it was 'A'ishah. He said to her: The Messenger of Allah (may Allah bless him and grant him peace) mentioned the people of a graveyard and prayed for them, but he did not inform us which graveyard it is. The Messenger of Allah (may Allah bless him and grant him peace) then entered upon her, and she asked him about it. He said to her: "The people of a graveyard in 'Asqalan."