Sayyidah Aishah (may Allah be pleased with her) narrates: Whenever the Messenger of Allah (peace and blessings be upon him) mentioned Sayyidah Khadijah (may Allah be pleased with her), he never tired of praising her and seeking forgiveness for her. One day he (peace and blessings be upon him) mentioned her, and jealousy drove me so far that I said: Allah has given you (something better) in place of an elderly woman. She said: I saw that the Messenger of Allah (peace and blessings be upon him) became so angry that I was stunned, and I said to myself: O Allah! If You remove the anger of the Messenger of Allah (peace and blessings be upon him) from me, I will never mention her (Sayyidah Khadijah) with anything bad as long as I live. Then when the Messenger of Allah (peace and blessings be upon him) saw my state, he said: "How could you say that? By Allah! She believed in me when people disbelieved in me, she affirmed my truthfulness when people belied me, and she was blessed with children from me while you have been deprived of that from me." Then for a month he (peace and blessings be upon him) kept mentioning this, morning and evening.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19327