Sahih al-Bukhari 5213

Arabic

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا بِشْرٌ، حَدَّثَنَا خَالِدٌ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ وَلَوْ شِئْتُ أَنْ أَقُولَ قَالَ النَّبِيُّ صلى الله عليه وسلم وَلَكِنْ قَالَ السُّنَّةُ إِذَا تَزَوَّجَ الْبِكْرَ أَقَامَ عِنْدَهَا سَبْعًا، وَإِذَا تَزَوَّجَ الثَّيِّبَ أَقَامَ عِنْدَهَا ثَلاَثًا‏.‏

English translation

Narrated Anas:The tradition, (of the Prophet) is that if someone marries a virgin and he has already a matron wife (with him), then he should stay with the virgin for seven days; and if someone marries a matron (and he has already a virgin wife with him) then he should stay with her for three days

Reference: Sahih al-Bukhari 5213, Book of Wedlock, Marriage (Nikaah). English translation by Dr. Muhammad Muhsin Khan.