They sent him to Umm Salama, but no mention was made of Kuraib.
Sahih Muslim Book 18, Hadith 72
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Her 'Idda is that period which is longer of the two (between four months and ten days and the birth of the child, whichever is longer). AbuSalama, however said: Her period of 'Idda is over (with the birth of the child), and they were contending with each other over this issue, whereupon Abu Huraira (Allah be pleased with him) said: I subscribe (to the view) held by my nephew (i. e. Abu Salama). They sent Kuraib (the freed slave of Ibn 'Abbas) to Umm Salama to ask her about it. He came (back) to them and informed them that Umm Salama (Allah be pleased with her) said that Subai'ah al-Aslamiyya gave birth to a child after the death of her husband when the few flights (had hardly) passed and she made mention of that to Allah's Messenger (ﷺ) and he commanded her to marry.
Sahih Muslim Book 18, Hadith 71 Next Hadith → I went to Umm Habiba, the wife of Allah's Apostle (ﷺ), when her father Abu Sufyan had died. Umm Habiba sent for a perfume having yellowness in it or something else like it, and she applied it to a girl and then rubbed it on her cheeks and then said: By Allah, I need no perfume but for the fact that I heard Allah's Messenger (ﷺ) say on the pulpit:" It is not permissible for a woman believing in Allah and the Hereafter to mourn for the dead beyond three days, but (in case of the death) of the husband it is permissible for four months and ten days." Zainab said: I then visited Zainab hint Jahsh (Allah be pleased with her) when her brother died and she sent for perfume and applied it and then said: By Allah, I don't feel any need for the perfume but that I heard Allah's Messenger (ﷺ) say on the pulpit:" It is not permissible for a woman believing in Allah and the Hereafbler to mourn the dead beyond three days except in case of her husband (for whom she can mourn) for four months and ten days." Zainab (Allah be pleased with her) said: I heard my mother Umm Salama (Allah be pleased with her) as saying: A woman came to Allah's Messenger (ﷺ) and said: Allah's Messenger. I have a daughter whose husband has died and there has developed some trouble in her eye; should we apply collyrium to it? Thereupon Allah's Messenger (ﷺ) said: No (repeating it twice or thrice, saying only, NO" all the time). Then he said: It is only four mouths and ten days, whereas in the preIslamic period none of you threw away the dung until one year had passed. Humaid said: I said to Zainab: What is this throwing of dung until a year is passed? Zainab said: When the husband of a woman died, she went into a hut and put on her worst clothes, and did not apply perfume or something like it until a year was over. Then an animal like a donkey, or a goat, or a bird was brought to her and she rubbed her hand over it, and it so happened that one on which she rubbed her hand died. She then came out of her house and she was given dung and she threw it and then she made use of anything like perfume or something else as she liked.
Sahih Muslim Book 18, Hadith 73
Sahih Muslim Book 18, Hadith 71 Next Hadith → I went to Umm Habiba, the wife of Allah's Apostle (ﷺ), when her father Abu Sufyan had died. Umm Habiba sent for a perfume having yellowness in it or something else like it, and she applied it to a girl and then rubbed it on her cheeks and then said: By Allah, I need no perfume but for the fact that I heard Allah's Messenger (ﷺ) say on the pulpit:" It is not permissible for a woman believing in Allah and the Hereafter to mourn for the dead beyond three days, but (in case of the death) of the husband it is permissible for four months and ten days." Zainab said: I then visited Zainab hint Jahsh (Allah be pleased with her) when her brother died and she sent for perfume and applied it and then said: By Allah, I don't feel any need for the perfume but that I heard Allah's Messenger (ﷺ) say on the pulpit:" It is not permissible for a woman believing in Allah and the Hereafbler to mourn the dead beyond three days except in case of her husband (for whom she can mourn) for four months and ten days." Zainab (Allah be pleased with her) said: I heard my mother Umm Salama (Allah be pleased with her) as saying: A woman came to Allah's Messenger (ﷺ) and said: Allah's Messenger. I have a daughter whose husband has died and there has developed some trouble in her eye; should we apply collyrium to it? Thereupon Allah's Messenger (ﷺ) said: No (repeating it twice or thrice, saying only, NO" all the time). Then he said: It is only four mouths and ten days, whereas in the preIslamic period none of you threw away the dung until one year had passed. Humaid said: I said to Zainab: What is this throwing of dung until a year is passed? Zainab said: When the husband of a woman died, she went into a hut and put on her worst clothes, and did not apply perfume or something like it until a year was over. Then an animal like a donkey, or a goat, or a bird was brought to her and she rubbed her hand over it, and it so happened that one on which she rubbed her hand died. She then came out of her house and she was given dung and she threw it and then she made use of anything like perfume or something else as she liked.
Sahih Muslim Book 18, Hadith 73