Alqama bin Mrthd علقمة بن مرثد · The Book of Funerals

"When Abu Talib was dying, the Prophet came to him and found Abu Jahl and 'Abdullah bin Abi Umayyah with him. He said: 'O uncle, say La ilaha illallah(there is none worthy of worship except Allah), a word with which I will defend you before Allah.' Abu Jahl and 'Abdullah bin Abi Umayyah said: 'O Abu Talib, are you turning away from the religion of 'Abdul-Muttalib.' Then the Prophet said: 'I will keep on asking for Allah's forgiveness for you…

"I was sitting with sulaiman bin Sard and Khalid bin 'Urfutah, and they said that a man had died as a result of abdominal illness. They wanted to attend his funeral, and one of them said to the other: 'Didn't the Messenger of Allah say: Whoever is killed by an abdominal illness, he will not be punished in his grave? The other said: 'Yes.'''