O Lord, the God of my salvation, I have cried to You for help by day; at night I am in Your presence. [Luke 18:7.] Let my prayer come before You and really enter into Your presence; incline Your ear to my cry! (Psalm 88:1, 2 AMP)
He sounds like someone who really needs God, is even desperate for Him. A lot of us get in that place sometime. This world can be really tough at any unexpected moment. It causes fear and it can cause a broken heart. So he goes back to the times that God has come through for Him... The God of his salvation. God is the rescuer of his soul and the defender from his enemies.
He's been on his knees crying, a sincere need for help! In the night he goes before God's presence so he sleeps safely, maybe even at peace. But his prayer for help, he needs to lay in God's presence at God's feet. The Lord does something that is so tender of Him. He bends down His ear so he is sure He has heard his cry. He doesn't have to bend down. He can hear perfectly well from where He is, however the psalmist needs Him near for the sake of his turmoil and need for his God.
We go through life alone in a sense. People let us down, or like the psalmist they chase us. Even those we love and who sincerely love us are fallible as are we. To have the Lord bend down His ear to be near us and to see our tears and listen to our cry is a privilege and a comfort sweet.