His father told him that he saw the Messenger of Allah ﷺ sitting when praying, putting his right forearm on his right thigh and raising his forefinger, which he had bent slightly, and he was supplicating.  

أَنَّهُ رَأَى رَسُولَ اللَّهِ ﷺ قَاعِدًا فِي الصَّلاَةِ وَاضِعًا ذِرَاعَهُ الْيُمْنَى عَلَى فَخِذِهِ الْيُمْنَى رَافِعًا أُصْبُعَهُ السَّبَّابَةَ قَدْ أَحْنَاهَا شَيْئًا وَهُوَ يَدْعُو