Matthew Henry on Psalms 54:1-3

God is faithful, though men are not to be trusted, and it is well for us it is so. David has no other plea to depend upon than God's name, no other power to depend upon than God's strength, and these he makes his refuge and confidence. This would be the effectual answer to his prayers. Looking unto David, betrayed by the men of Judah, and to Jesus, betrayed by one of his apostles, what can we expect from any who have not set God before them, save ingratitude, treachery, malice, and cruelty? What bonds of nature, or friendship, or gratitude, or covenant, will hold those that have broken through the fear of God? Selah; Mark this. Let us set God before us at all times; for if we do not, we are in danger of despair.