Musnad Ahmad 1153:1377

Muhammad ibn Ja‘far narrated to us, from Sa‘id, from Abu Ma‘shar, from Ibrahim al-Nakha‘i, that he used to enter upon ‘A’ishah. He said: I said, "And how did he use to enter upon her?" He said: "He used to go out with his maternal uncle, al-Aswad." He said: "And there was between him and ‘A’ishah a bond of brotherhood and affection."