The waiting period of an umm walad when her master dies

It is narrated from Sayyiduna Amr bin al-As (may Allah be pleased with him) that he said: Do not confuse for us the Sunnah of our Prophet Muhammad (peace and blessings be upon him) regarding the umm walad (a slave woman who has borne her master a child): when her master dies, her waiting period is "four months and ten days" [Surah al-Baqarah: 234].
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him); he relates: I heard the Messenger of Allah (peace and blessings be upon him) say: "While I was asleep, two men suddenly came to me. They took hold of me by my upper arms and brought me to a rugged mountain and said to me: Climb it. I said: I do not have the strength for it. They said: We will make it easy for you. So I climbed until, when I reached the top of the mountain, loud voices could be heard. I asked: What are these voices? They said: These are the howls of the people of Hell. Then I was taken further, and I saw people hanging by their hamstrings (the tendons above the heel), the corners of their mouths torn and flowing with blood. I asked: Who are these people? They said: These are the ones who used to break their fast before its time (without excuse). Then I was taken further, and I saw people who were extremely swollen, gave off a foul stench and were most hideous to look at. I asked: Who are these? They said: These are the men and women who commit fornication. Then I was taken further, and I saw women whose breasts were being bitten by snakes. I asked: What is the matter with them? They said: These are the women who used to withhold their milk from their children. Then I was taken further, and I saw some children playing between two rivers. I asked: Who are these? They said: These are the offspring of the believers who died in childhood. Then an elevated place appeared before me, where I saw three men drinking from their wine (the drink of Paradise or the cup of al-Kawthar). I asked: Who are these? They said: These are Ja'far bin Abi Talib, Zayd and Ibn Rawahah. Then another elevated place appeared before me, where there were three men. I asked: Who are these? They said: These are Ibrahim, Musa and Isa (peace be upon them), and they are waiting for you."
This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs did not record it. Imam Bukhari used all of its narrators as evidence except Sulaym bin Amir, and Imam Muslim used Sulaym bin Amir as evidence as well.

Muhammad bin Thabit relates that his father, Sayyiduna Thabit bin Qays (may Allah be pleased with him), separated from Jamilah bint Abdullah bin Ubayy while she was pregnant with Muhammad. When she gave birth to him, she swore that she would not nurse him with her milk. So the Messenger of Allah (peace and blessings be upon him) sent for the child, put some of his blessed saliva into his mouth, performed tahnik for him with an Ajwah date, named him Muhammad, and said: "Take him around (to wet nurses); Allah will surely provide for him." The narrator says: I took him around on the first, second and third days, and suddenly there was a woman of the Arabs asking about Thabit bin Qays. I said: What do you want with him? I am Thabit. She said: I saw this child in my dream, as though I were nursing a son of his called Muhammad. Thabit said: I am Thabit, and this is my son Muhammad. The narrator says: (At that very moment) milk was dripping from the woman's breast.
This hadith has a sahih chain of transmission, but the two Shaykhs did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: This verse, "without being turned out" [Surah al-Baqarah: 240], abrogated the ruling that (the widow) must stay in her in-laws' home during the waiting period; now she may spend her waiting period wherever she wishes. Ata' said: If she wishes, she may stay with her in-laws and reside there according to her bequest, and if she wishes, she may leave (from there), because Allah says: "Then there is no sin upon you in what they do with themselves" [Surah al-Baqarah: 240]. Ata' further said: Then the ruling of inheritance came and abrogated the (permanent) right of residence; now she may spend her waiting period wherever she wishes.
This hadith is sahih (authentic) on the condition of Imam Bukhari, but the two Shaykhs did not record it.

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that a poor (slave or slave girl) belonging to a man of the Ansar came and said: My master forces me into prostitution. Upon this, the verse was revealed: "And do not force your slave girls into prostitution" [Surah al-Nur: 33].
This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs did not record it.