(44, 45) باب عَقْلِ الأَصَابِعِ
It was narrated from Ibn 'Abbas:
"This and this are the same: The little finger and the thumb (sahih) (AR)
Reference (AR): Sunan an-Nasa'i 4848 (AR)
In-book reference (AR): Book 45, Hadith 143 (AR)
English translation (AR): Vol. 5, Book 45, Hadith 4852 (AR)