The first half of this stanza showed one reason that the psalmist was certain that God would deliver him. The rest of this passage gives two more reasons. Take a look at this passage in Psalm 119:125-128:
God is a loving God. Of course, that goes hand in hand with his holiness and the need for righteousness in our lives. As the psalmist has discovered and revealed in this stanza of Psalm 119, God will deliver his people because of his love; and, in fact, God will deliver the psalmist because of that love.
The psalmist has enemies, and his enemies are the enemies of God. This is perhaps the lowest point in the entirety of Psalm 119, and we see the writer cry out for deliverance. His first reason for requesting that deliverance is because of God’s love, in verse 124.
The second reason the psalmist gives here is because he is God’s servant. The writer is basically declaring, “I belong to you, God! Help me because of that!” And like any good earthly master, who cares for that which belongs to him, should God do any less than care for those who belong to him?
The psalmist also seems to understand that God’s deliverance can be seen in the Word. He asks for deliverance, and he asks for it in the form of discernment to understand God’s statutes completely. You can see this clearly in verse 125.