The messengers were three hundred and fifteen

It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that a man said: "O Messenger of Allah! Was Sayyiduna Adam (peace be upon him) a prophet?" He (peace and blessings be upon him) said: "Yes, he was a prophet taught by Allah and spoken to by Him." He asked: "How long was there between him and Nuh (peace be upon him)?" He (peace and blessings be upon him) said: "Ten centuries." He asked again: "How long was there between Nuh and Ibrahim (peace be upon them both)?" He (peace and blessings be upon him) said: "Ten centuries." The people asked: "O Messenger of Allah! What was the total number of the messengers?" He (peace and blessings be upon him) said: "Three hundred and fifteen, a great multitude."
This hadith is sahih (authentic) on the condition of Muslim, but 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) concerning the saying of Allah: "Enter the gate prostrating" [Surah al-Baqarah: 58], that (they had been commanded) to enter through a narrow gate, bowing, and to say "Hittah", meaning forgiveness. But instead they said "hintah" (wheat) and entered dragging themselves on their backsides. It is about this that Allah Almighty says: "But those who did wrong changed the word to other than what had been said to them." [Surah al-Baqarah: 59]
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 Abdullah bin Abbas (may Allah be pleased with them both) that: Why do you ask (the People of the Book) about anything when you have the Book of Allah, which is the most recent news revealed from Allah! Allah has informed you that they wrote a book with their own hands, altered it, distorted it and said: "This is from Allah," in order to gain a small price by it. Whereas you have the Book of Allah (the Qur'an), which is pure and has no admixture in it. So by Allah! Not one of them asks you about what has been revealed to you.
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 Abdullah bin Abbas (may Allah be pleased with them both) that the Jews of Khaybar used to fight the tribe of Ghatafan, and whenever they met, the Jews of Khaybar would be defeated. So the Jews turned to this supplication and said: 'Allahumma inna nas'aluka bi-haqqi Muhammadin al-nabiyyi al-ummiyyi alladhi wa'adtana an tukhrijahu lana fi akhir al-zaman illa nasartana alayhim' (O Allah, we ask You by the right of the unlettered Prophet Muhammad (peace and blessings be upon him), whom You promised us You would send forth for us at the end of time, that You help us against them). The narrator said: Whenever they met in battle, they would make this supplication and defeat Ghatafan. But when the Prophet (peace and blessings be upon him) was sent, they disbelieved in him. Then Allah Almighty revealed this verse: that they used to pray for victory over the disbelievers through you (O Muhammad (peace and blessings be upon him)).
It has been mentioned in the tafsir out of necessity, and it is gharib (singular) among his hadith.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) concerning the saying of Allah: "And you will surely find them the most eager of people for life" [Surah al-Baqarah: 96], that it refers to the Jews, and "and (even more than) those who associate others with Allah" refers to the non-Arab polytheists.
The two Shaykhs agreed upon the chain of a Companion's tafsir, and this chain is sahih (authentic) on the condition of both of them, but they did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) concerning the saying of Allah: "Each one of them wishes that he could be given a life of a thousand years" [Surah al-Baqarah: 96], that he said: "It refers to the saying of the non-Arabs when someone sneezes: 'Zihi hazar sal' (that is, may you live a thousand years)."

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) concerning the saying of Allah: "And you will surely find them the most eager of people for life", that he said: "It refers to these People of the Book." And concerning "and (even more than) those who associate others with Allah. Each one of them wishes that he could be given a life of a thousand years, but it would not remove him from the punishment that he should be given life" [Surah al-Baqarah: 96], he said that it refers to their (the non-Arab polytheists') saying to their companion: "A thousand years, Nowruz and Mihrajan (may they be blessed and long for you)."