Musnad Ahmad 1153:1642

Hammad ibn Usamah narrated to us, he said: Hisham informed us, from his father, from Aisha, she said: I used to enter my house in which the Messenger of Allah (peace and blessings of Allah be upon him) and my father were buried, and I would take off my garment, and I would say: "It is only my husband and my father." But when Umar was buried with them, by Allah, I did not enter it except while I was wrapped in my garments, out of modesty before Umar.