Musannaf Ibn Abi Shaybah 2965 — Those who disliked squatting (iqa)

Ibrahim considered it disliked in prayer to sit on the buttocks with the shins pressed against the thighs (iq'a'), and to sit in such a way (tawarruk) that the person praying places his right hip on his right foot, which is kept upright with its toes pointing towards the qiblah, rests his left hip on the ground, and stretches out his left foot so that it comes out to the right side.