Musannaf Ibn Abi Shayba 3:360

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Isra’il, from Abu Ishaq, he said: Alqama and Masruq used to pray in their burnouses (hooded cloaks) and their *mustaqat* (garments with sleeves), and they would not take their hands out.