Cross reference
2 Kings 20:2
2 Then he turned his face to the wall, and prayed to Yahweh, saying,
Psalms 50:15
15 Call on me in the day of trouble. I will deliver you, and you will honor me."
1 Kings 8:30
30 Listen you to the supplication of your servant, and of your people Israel, when they shall pray toward this place: yes, hear in heaven, your dwelling-place; and when you hear, forgive.
Isaiah 38:2-3
2 Then Hezekiah turned his face to the wall, and prayed to Yahweh,
3 and said, Remember now, Yahweh, I beg you, how I have walked before you in truth and with a perfect heart, and have done that which is good in your sight. Hezekiah wept sore.
Matthew 6:6
6 But you, when you pray, enter into your inner chamber, and having shut your door, pray to your Father who is in secret, and your Father who sees in secret will reward you openly.