Charles H. Spurgeon on Psalms 72:9

They that dwell in the wilderness shall bow before him. Unconquered by arms, they shall be subdued by love. Wild and lawless as they have been, they shall gladly wear his easy yoke; then shall their deserts be made glad, yea, they shall rejoice and blossom as the rose. And his enemies shall lick the dust. If they will not be his friends, they shall be utterly broken and humbled. Dust shall be the serpent's meat; the seed of the serpent shall be filled therewith. Homage among Orientals is often rendered in the most abject manner, and truly no sign is too humiliating to denote the utter discomfiture and subjugation of Messiah's foes. Tongues which rail at the Redeemer deserve to lick the dust. Those who will not joyfully bow to such a prince richly merit to be hurled down and laid prostrate; the dust is too good for them, since they trampled on the blood of Christ.