Sunan Abi Dawud 2124
سنن أبي داود#2124SahihNarrated Anas b. Malik :When a man who has a wife married a virgin he should stay with her seven nights ; if he marries to a woman who has been previously married he should stay with her three nights. (The narrator said:) If I say that he (Anas) narrated this tradition from the Prophet (ﷺ) I shall be true. But he said: The Sunnah is so-and-so
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (5213) Sahih Muslim (1461)
In-book reference: 12:79