Tafsir of the verse "His bearing and weaning are thirty months"

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: When a woman carries the child for nine months, she will breastfeed it for twenty-one months; and if she carries it for six months, she will breastfeed it for twenty-four months. Then, as proof of this, he recited this verse: "And his bearing and his weaning are thirty months" [Surah al-Ahqaf: 15].
This hadith has a sahih (authentic) chain of narration, and the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both); he said: This verse abrogated the requirement for the widow to spend her waiting period (for a year) among her family; now she may spend her waiting period wherever she wishes, because of Allah's words: "without being turned out" [Surah al-Baqarah: 240]. Ata said: If she wishes, she may spend her waiting period among her family, and if she wishes, she may leave, because of the words of Allah, the Mighty and Majestic: "But if they leave (of their own accord), there is no sin upon you for what they do with themselves (in a lawful manner)" [Surah al-Baqarah: 240].
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he stood here (in Basrah) and addressed the people. He recited Surah al-Baqarah to them and explained its rulings to them. When he reached this verse: "if he leaves wealth, to make a bequest for parents and near relatives (is obligatory)" [Surah al-Baqarah: 180], he said: This has been abrogated. Then he continued reciting until he reached this verse: "And those of you who die and leave behind wives" up to "without being turned out" [Surah al-Baqarah: 234 - 240], and he said: And this (verse) too (is abrogated).
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) concerning this saying of Allah Almighty: "And those of you who die and leave behind wives, they (the wives) shall wait by themselves for four months and ten days" [Surah al-Baqarah: 234]; he said: (Allah) did not say that they must spend their waiting period in their own houses. So the woman whose husband has died may stay wherever she wishes (during her waiting period).

It is narrated from Sayyiduna al-Bara bin Azib (may Allah be pleased with him); he said: (This verse was first) revealed as: "Guard the prayers, and especially the Asr prayer." So we recited it that way in the time of the Messenger of Allah (peace and blessings be upon him) for as long as Allah willed. Then Allah Almighty abrogated it and sent down this verse: "Guard all the prayers, and especially the middle prayer" [Surah al-Baqarah: 238]. A man asked him: Does it mean the Asr prayer? He replied: I have told you how it was revealed and how Allah abrogated it, and Allah knows best.
This hadith is sahih (authentic) on the condition of Muslim, and the two Shaykhs (Bukhari and Muslim) did not record it.