Ubaydullah bin Abdullah reported,

Abdullah bin Utba wrote to Umar bin Abdullah bin Arqam Zuhri telling him to visit Subayah bint Harith Aslamiyya and ask her about the ruling the Messenger of Allah ﷺ had given her regarding her pregnancy.Umar bin Abdullah went in to see her and questioned her, and she told him that she had been married to Saad bin Khawla, who was among the companions of the Messenger of Allah ﷺ who fought at Badr. He died during the Farewell Pilgrimage, and she gave birth before four months and ten days had passed since her husband's death.When she had recovered from her postnatal bleeding, Abu Sanabil, a man from the tribe of Banu Abd al-Dar, came in to see her and noticed that she had adorned herself. He said, "Perhaps you are hoping to remarry before four months and ten days have passed?"She said, "When I heard that from Abu Sanabil, I went to the Messenger of Allah ﷺ and told him what had happened."The Messenger of Allah ﷺ said, "You became permitted to marry the moment you delivered your child."

Nasai 3550

Sahih

أخبرنا كثير بن عبيد قال حدثنا محمد بن حرب عن الزبيدي عن الزهري

عن عبيد الله بن عبد الله

أن عبد الله بن عتبة كتب إلى عمر بن عبد الله بن الأرقم الزهري أن ادخل على سبيعة بنت الحارث الأسلمية فاسألها عما أفتاها به رسول الله ﷺ في حملها قال فدخل عليها عمر بن عبد الله فسألها فأخبرته أنها كانت تحت سعد بن خولة وكان من أصحاب رسول الله ﷺ ممن شهد بدرا فتوفي عنها في حجة الوداع فولدت قبل أن تمضي لها أربعة أشهر وعشرا من وفاة زوجها فلما تعلت من نفاسها دخل عليها أبو السنابل رجل من بني عبد الدار فرآها متجملة فقال لعلك تريدين النكاح قبل أن تمر عليك أربعة أشهر وعشرا قالت فلما سمعت ذلك من أبي السنابل جئت رسول الله ﷺ فحدثته حديثي فقال رسول الله ﷺ قد حللت حين وضعت حملك

النسائي 3550صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Nasai Sughra
Book
Divorce
Chapter
Waiting period of a pregnant woman whose husband has died
Numbering
Darussalam 3550
Nasai 3550