The Prophet ﷺ said, "This and this are equal," meaning the little finger and the thumb.
حدثنا محمد بن بشار حدثنا يحيى بن سعيد ومحمد بن جعفر قالا حدثنا شعبة عن قتادة عن عكرمة
عن النبي ﷺ قال هذه وهذه سواء يعني الخنصر والإبهام
[Its chain of transmission is sahih]. Ibn Majah reported it in "Diyat," chapter "Diyat of the Fingers," Hadith 2652, from Muhammad bin Bashshar, and Bukhari reported it, Hadith 6895, from the hadith of Shubah, through the same chain.