The Messenger of Allah ﷺ returned his daughter Zaynab to Abu al-As on the basis of the original marriage, without anything new being established. Muhammad bin Amr said in his version, "after six years," while Hasan bin Ali said, "after two years."
حدثنا عبد الله بن محمد النفيلي حدثنا محمد بن سلمة ح و حدثنا محمد بن عمرو الرازي حدثنا سلمة يعني ابن الفضل ح و حدثنا الحسن بن علي حدثنا يزيد المعنى كلهم عن ابن إسحق عن داود بن الحصين عن عكرمة
رد رسول الله ﷺ ابنته زينب على أبي العاص بالنكاح الأول لم يحدث شيئا قال محمد بن عمرو في حديثه بعد ست سنين وقال الحسن بن علي بعد سنتين
[Its chain is daif] Tirmidhi reported it in the Book of Marriage, Chapter on What Has Been Said Concerning a Married Couple Who Are Polytheists When One of Them Embraces Islam, hadith no. 1143, and Ibn Majah, hadith no. 2009, both from the hadith of Ibn Ishaq, through this chain.Dawud bin Husayn is trustworthy, but Ibn Madini said, "Whatever he narrated from Ikrima is objectionable."