Sunan an-Nasa'i 4848
سنن النسائي#4848SahihIt was narrated from Ibn 'Abbas:"This and this are the same: The little finger and the thumb (sahih)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Isnaad Mauquf
Al-AlbaniSahih Isnaad Mauquf
Zubair Ali ZaiHasan
In-book reference: 45:143