'A'isha reported: Never did I feel jealous of the wives of Allah's Apostle (may peace be upon him) but in case of Khadija, although I did no, (have the privilege to) see her. She further added that whenever Allah's Messenger (may peace be upon him) slaughtered a sheep, he said: Send it to the companions of Khadija I annoyed him one day and said: (It is) Khadija only who always prevails upon your mind. Thereupon Allah's Messenger (may peace be upon him) said: Her love had been nurtured in my heart by Allah Himself. From Sahih Al Bukhair English reference: Book 31, Hadith 5972 Arabic reference: Book 45, Hadith 6431 --- I've heard this hadith mentioned many times in lectures, and they always comment on the word used in Arabic for that bolded part. He said "ruziqtu hubbihaa", meaning to say Allah gave him rizq, that is love for her (Khadija radiyallahu `anhaa). So they say from that thatthe love a man has for his wife is rizq from Allah