(5) باب الرَّجُلِ يُرَاجِعُ وَلاَ يُشْهِدُ
Narrated Mutarrif ibn Abdullah:
Imran ibn Husayn was asked about a person who divorces his wife, and then has intercourse with her, but he does not call any witness to her divorce nor to her restoration. He said: You divorced against the sunnah and took her back against the sunnah. Call someone to bear witness to her divorce, and to her return in marriage, and do not repeat it.
Reference: Sunan Abi Dawud 2186
In-book reference: Book 13, Hadith 12
English translation: Book 12, Hadith 2181