Because

Psalm 54:3, 4
For strangers rise up against me, and ruthless men seek my life--men with no regard for God. Selah . . .

therefore

Psalm 5:11
But let all who take refuge in You rejoice; let them ever shout for joy. May You shelter them, that those who love Your name may rejoice in You.

Psalm 21:1
O LORD, the king rejoices in Your strength. How greatly he exults in Your salvation!

Psalm 57:1
Have mercy on me, O God, have mercy, for in You my soul takes refuge. In the shadow of Your wings I will take shelter until the danger has passed.

Psalm 61:4
Let me dwell in Your tent forever and take refuge in the shelter of Your wings. Selah

1 Samuel 17:37
David added, "The LORD who delivered me from the claws of the lion and the bear will deliver me from the hand of this Philistine." "Go, " said Saul, "and may the LORD be with you."

2 Corinthians 1:10
He has delivered us from such a deadly peril, and He will deliver us. In Him we have placed our hope that He will yet again deliver us,