Narrated 'Aishah:
"I was not jealous of any wife of the Prophet (ﷺ) as I was jealous of Khadijah, and it was not because I did not see her. It was only because the Messenger of Allah (ﷺ) mentioned her so much, and because whenever he would slaughter a sheep, he would look for Khadijah's friends to give them some of it." (ES)
English reference (ES): Vol. 1, Book 46, Hadith 3875 (ES)
Arabic reference (ES): Book 49, Hadith 4249 (ES)