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.
Reference: Sahih al-Bukhari 5214 In-book : Book 67, Hadith 147 USC-MSA web (English) : Vol. 7, Book 62, Hadith 141 (deprecated)
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