Musannaf Ibn Abi Shayba 16:611

Abu Bakr narrated to us, he said: Yazid bin Harun narrated to us, from Abd al-Malik bin Abi Sulayman, from Sulayman al-Ahwal, from Mujahid, he said: Dragging the qamis (shirt) and the izar (lower garment) are the same.