Charles H. Spurgeon on Psalms 78:34

When he slew them, then they sought him. Like whipped curs, they licked their Master's feet. They obeyed only so long as they felt the whip about their loins. Hard are the hearts which only death can move. While thousands died around them, the people of Israel became suddenly religious, and repaired to the tabernacle door, like sheep who run in a mass while the black dog drives them, but scatter and wander when the shepherd whistles him off. And they returned and enquired early after God. They could not be too zealous, they were in hot haste to prove their loyalty to their divine King. "The devil was sick and the devil a monk would be." Who would not be pious while the plague is abroad? Doors, which were never so sanctified before, put on the white cross then. Even reprobates send for the minister when they lie a dying. Thus sinners pay involuntary homage to the power of right and the supremacy of God, but their hypocritical homage is of small value in the sight of the Great Judge.