It is narrated from Nafi' (may Allah have mercy on him) that Ibn Umar (may Allah be pleased with them both), when he performed prostration, would place his palms at the spot where he placed his face. Nafi' (may Allah have mercy on him) says: I saw him in severe cold, that he would take his hands out from his cloak (and place them on the ground).
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 243