Narrated Abdullah ibn Abbas: The Prophet ﷺ said: Do not cover the walls. He who sees the letter of his brother without his permission, sees Hell-fire. Supplicate Allah with the palms of your hands; do not supplicate Him with their backs upwards. When you finish supplication, wipe your faces with them. Abu Dawud said: This tradition has been transmitted through a different chains by Muhammad bin Kab; all of them are weak. The chain I have narrated is best of them; but it is also weak.

Narrated Malik ibn Yasar as-Sakuni, al-Awfi: The Prophet ﷺ said: When you make requests to Allah, do so with the palms of your hands, and not backs, upwards. Abu Dawud said: The narrator Sulaiman bin Abd al-Hamid said: according to us Malik bin Yasar was a Companion of the Prophet ﷺ.