'Umar (RAA) narrated, 'When the Messenger of Allah (ﷺ) 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 are:
(AR)
English reference (AR): Book 16, Hadith 1596 (AR)
Arabic reference (AR): Book 16, Hadith 1553 (AR)