(2) باب طَلاَقِ الثَّلاَثِ
Abu Sahba' said toIbn 'Abbas (Allah be pleased with them):
Do you know that three (divorces) were treated as one during the lifetime of Allah's Apostle (ﷺ), and that of Abu Bakr, and during three (years) of the caliphate of Umar (Allah be pleased with him)? Ibn Abbas (Allah be pleased with them) said: Yes.
Reference: Sahih Muslim 1472 b
In-book reference: Book 18, Hadith 23
USC-MSA web (English) reference(deprecated numbering scheme): Book 9, Hadith 3492