Musnad Ahmad 1153:3

'Abbad ibn 'Abbad narrated to us, from Hisham ibn 'Urwah, from his father, from 'Aishah, that the Messenger of Allah (peace and blessings of Allah be upon him) used to say to her: "I truly know your anger when you are angry, and your pleasure when you are pleased." She said: "And how do you know that, O Messenger of Allah?" He said: "When you are angry, you say: 'O Muhammad,' and when you are pleased, you say: 'O Messenger of Allah.'"