MUSLIM 579a:
from ʿĀmir b. ʿAbdullāh b. al-Zubayr from his father —
When the Messenger of Allah ﷺ sat in prayer. he placed the left foot between his thigh and shank and stretched the right foot and placed his left hand on his left knee and placed his right hand on his right thigh, and raised his finger.
مسلم ٥٧٩a:
عن عامر بن عبد الله بن الزبير عن أبيه —
كَانَ رَسُولُ اللَّهِ ﷺ إِذَا قَعَدَ فِي الصَّلاَةِ جَعَلَ قَدَمَهُ الْيُسْرَى بَيْنَ فَخِذِهِ وَسَاقِهِ وَفَرَشَ قَدَمَهُ الْيُمْنَى وَوَضَعَ يَدَهُ الْيُسْرَى عَلَى رُكْبَتِهِ الْيُسْرَى وَوَضَعَ يَدَهُ الْيُمْنَى عَلَى فَخِذِهِ الْيُمْنَى وَأَشَارَ بِإِصْبَعِهِ