وَعَنْ اِبْنِ عُمَرَ رَضِيَ اَللَّهُ عَنْهُمَا
«أَنَّ رَسُولَ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا قَعَدَ لِلتَّشَهُّدِ وَضَعَ يَدَهُ اَلْيُسْرَى عَلَى رُكْبَتِهِ اَلْيُسْرَى، وَالْيُمْنَى عَلَى اَلْيُمْنَى، وَعَقَدَ ثَلَاثَةً وَخَمْسِينَ، وَأَشَارَ بِإِصْبَعِهِ اَلسَّبَّابَةِ»
When the Messenger of Allah (sallallahu alayhi wa sallam) sat for at-Tashahhud, he placed his left hand on his left knee, and his right hand on his right knee, folded its fingers and pointed with his right index finger.
Bulugh al-Maram 376, Book 2, The Book of Prayer, Hadith 197. 1 min read