Charles H. Spurgeon on Psalms 79:9

"Help us, O God of our salvation, for the glory of thy name." This is masterly pleading. No argument has such force as this. God's glory was tarnished in the eyes of the heathen by the defeat of his people, and the profanation of his temple; therefore, his distressed servants implore his aid, that his great name may no more be the scorn of blaspheming enemies. "And deliver us, and purge away our sins, for thy name's sake." Sin,—the root of the evil—is seen and confessed; pardon of sin is sought as well as removal of chastisement, and both are asked not as matters of right, but as gifts of grace. God's name is a second time brought into the pleading. Believers will find it their wisdom to use very frequently this noble plea: it is the great gun of the battle, the mightiest weapon in the armoury of prayer.