مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1998
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn "Abbas (رضي الله عنه) that the Prophet (ﷺ) said: "This and this are the same [with regard to diyah]" - the pinkie finger and the thumb”
Musnad Ahmad 1999Sahih (Darussalam) [ alBukhari (6895)]