Sunan Abi Dawud 2308
سنن أبي داود#2308SahihNarrated Amr ibn al-'As: Do not confuse us about his Sunnah. Ibn al-Muthanna said: The Sunnah of our Prophet (ﷺ) is that the waiting period of a slave-mother whose husband has died is four months and ten days
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
Zubair Ali ZaiIsnaad Hasan
In-book reference: 13:134