Lady Aisha Siddiqa (may Allah be pleased with her) narrates that the Prophet Muhammad (peace be upon him) said to me: I can tell when you are pleased with me and when you are angry with me. Lady Aisha (may Allah be pleased with her) asked: O Messenger of Allah (peace be upon him), how do you know this? The Prophet Muhammad (peace be upon him) said: When you are pleased with me, while swearing an oath you say, "By the Lord of Muhammad (peace be upon him)!" And when you are angry with me, you say, "By the Lord of Ibrahim (peace be upon him)!" So I said: Yes, but I only leave out your name.