It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she said: I never felt as much jealousy over any wife of the Messenger of Allah (peace and blessings be upon him) as I felt over Sayyidah Khadijah (may Allah be pleased with her), because he (peace and blessings be upon him) mentioned her so often.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19323