Sunan Abi Dawud 2522
سنن أبي داود#2522SahihNarrated AbudDarda': The Prophet (ﷺ) said: The intercession of a martyr will be accepted for seventy members of his family. Abu Dawud said: The correct name if the narrator is Rabah b. al-Walid (and not al-walid b. Rabah as occurred in the chain of narrators in the text of the tradition)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih Lighairihi
Zubair Ali ZaiHasan
In-book reference: 15:46