Charles H. Spurgeon on Psalms 79:12

"And render unto our neighbours sevenfold into their bosom their reproach, wherewith they have reproached thee, O Lord." They denied thine existence, mocked thy power, insulted thy worship, and destroyed thy house; up, therefore, O Lord, and make them feel to the full that thou art not to be mocked with impunity. Pour into their laps good store of shame because they dared insult the God of Israel. Recompense them fully, till they have received the perfect number of punishments. It will be so. The wish of the text will become matter of fact. The Lord will avenge his own elect though he bear long with them.