مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3126
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn ‘Abbas (رضي الله عنه) that The Messenger of Allah (ﷺ) said: “This and this are the same," meaning the pinkie finger and the thumb (i.e., in terms of diyah].
Musnad Ahmad 3150Its isnad is saheeh, al-Bukhari (6895)]