Sunan an-Nasa'i - Book 26, Hadith 2
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Narrated Ibn 'Abbas: It was narrated that Ibn 'Abbas said: "When the Messenger of Allah died he had nine wives; he used to be intimate with all of them except one, who had given her day and night to 'Aishah."
How the Prophet ص modelled this behaviour here
Justice & Fairness
“he used to be intimate with all of them”
Treats his wife (and co-wives) justly and equitably; honors her rights and gives her what is due without wronging her.