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 b. Ka'b; all of them are weak. The chain I have narrated is best of them; but it is also weak.

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 b. 'Abd al-Hamid said: according to us Malik b. Yasar was a Companion of the Prophet (ﷺ).

I saw the Messenger of Allah (ﷺ) supplicating Allah in this manner with the palms of his hands and also with their backs upwards.

The Prophet (ﷺ) said: Your Lord is munificent and generous, and is ashamed to turn away empty the hands of His servant when he raises them to Him.

Ikrimah quoted Ibn Abbas as saying: When asking for something you should raise your hands opposite to your shoulders; when asking for forgiveness you should point with one finger; and when making an earnest supplication you should spread out both your hands.

Earnest supplication should be made like this: he raised his hand and made his palms in the direction of his face.

The above mentioned tradition has also been transmitted in a similar manner by Ibn 'Abbas from the Messenger of Allah (ﷺ).

When the Prophet (ﷺ) made supplication (to Allah) he would raise his hands and wipe his face with his hands.

The Messenger of Allah (ﷺ) heard a man saying: O Allah, I ask Thee, I bear witness that there is no god but Thou, the One, He to Whom men repair, Who has not begotten, and has not been begotten, and to Whom no one is equal, and he said: You have supplicated Allah using His Greatest Name, when asked with this name He gives, and when supplicated by this name he answers.