Mishkat al-Masabih

Malik b. Yasar reported God’s messenger as saying, “When you make requests of God, do so with the palms of your hands and not the backs upward.” In the version of Ibn ‘Abbas he said, “When you make requests of God, do so with the palms of your hands and not the backs upward, and when you are finished wipe your faces with them.” Abu Dawud transmitted it.