Sunan Abi Dawud 362
سنن أبي داود#362SahihThis tradition has been transmitted by Hisham through a different chain of narrators to the same effect:Rub it off (with a stone), and then scratch it (with finger) by pouring water, then sprinkle water upon it
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
Zubair Ali ZaiIsnaad Sahih
In-book reference: 1:362