question #3 Sahih al-Bukhari 5214, Book 67, Hadith 147 : What is the significance of equitable time distribution between wives in Islamic marital practices?

It is the Prophet’s tradition that if someone marries a virgin and he has already a matron wife then he
should stay for seven days with her (the virgin) and then by turns; and if someone marries a matron
and he has already a virgin wife then he should stay with her (the matron) for three days, and then by
turns.