The Prophet ﷺ said, "This and this are the same." He meant the little finger and the thumb.  

عَنِ النَّبِيِّ ﷺ قَالَ هَذِهِ وَهَذِهِ سَوَاءٌ يَعْنِي الْخِنْصَرَ وَالإِبْهَامَ  

I heard the Prophet (saying the same as above Hadith 34).  

سَمِعْتُ النَّبِيَّ ﷺ نَحْوَهُ