Sahih al-Bukhari Hadith 5214

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. Abu Qilabah says that he can say if he wishes that Hadrat Anas رضی اللہ عنہ has reported it tracing it back to the prophet ﷺ has reported it tracing it back to the prophet Similarly, Abdul Razzaq, Sufyan, Ayyub has reported from Khalid- Kha lid says; If I wish, I can say that he has reported it tracing it to the prophet ﷺ.