Isaiah 38:2
Then Hezekiah turned his face toward the wall, and prayed unto the Lord,
Cross-reference
Psalm 50:15
Parallel
Psalm 50:15 commands calling on God in trouble with a promise of deliverance — Hezekiah's prayer exemplifies this.
Psalm 91:15
Parallel
Psalm 91:15 promises God will answer and honor those who call in trouble — Hezekiah's cry fits this promise.
2 Kings 20:2
Parallel
This is the parallel account of Hezekiah turning his face to the wall and praying — nearly identical.