When Abdullah bin Umar wanted to sleep or eat while in a state of major ritual impurity, he would wash his face and his hands up to the elbows and wipe his head, and then he would eat or sleep.
و حدثني عن مالك
أن عبد الله بن عمر كان إذا أراد أن ينام أو يطعم وهو جنب غسل وجهه ويديه إلى المرفقين ومسح برأسه ثم طعم أو نام