Hadith 7008
Lady Aisha Siddiqa (may Allah be pleased with her) narrates: The Prophet Muhammad (peace be upon him) used to mention Lady Khadijah (may Allah be pleased with her) frequently. I said: Allah Almighty has granted you other wives after that old woman of the Quraysh with red lips. Upon this, the blessed face of the Prophet (peace be upon him) turned red. I had only seen this state in him at the time of the descent of revelation. If any veiled woman also saw the Prophet (peace be upon him), she would know whether it was due to kindness or due to displeasure.