'Umar (RAA) narrated, ‘When the Messenger of Allah ( صلی اللہ علیہ وسلم ) raised his hands in supplication, he did not lower them till he wiped his face with them.’ Related by At-Tirmidhi. There are other traditions, which support this narration, of which is: The Hadith narrated by Ibn ’Abbas (RAA) related by Abu Dawud and others. Put together, they confirm that it is Hasan.