What kind of intercession is mentioned in the Hadith of Ibn Abbas: "There is no Muslim man who dies, and forty men who associate nothing with Allah stand over his funeral prayer, but Allah will make them intercede for him"? Does it imply the certainty of Paradise and the effacement of major sins that the deceased committed without repentance?

The Hadiths indicate that if 100 people pray over a deceased person, or 40 people who do not associate anything with Allah, then Allah accepts their intercession for the deceased. The reason for the differing numbers is due to the varying forms of the questions posed to the Prophet, peace and blessings be upon him. This intercession signifies the prayers of those performing the funeral prayer for the deceased's forgiveness and mercy, and Allah's acceptance of this supplication. This intercession covers minor and major sins and is among the causes for the forgiveness of sins, though it does not necessarily guarantee entry into Paradise.