Tawarruk and Iq'a in the Prayer

Tawarruk means sitting on the hip, left foot under the right leg, right foot upright; Malikis use it in the last sitting of three- or four-rakat prayers. Iq'a on the heels was called sunna by Ibn Abbas (Muslim); iq'a like a sitting animal is disliked. None of this affects the validity of the prayer.