Psalms 78:41-42

And limited the Holy One of Israel Prescribing to him what proofs he should give of his power and presence with them, and what methods he should take in leading them and providing for them; directing him what to do, and when, and in what manner, to do it, and murmuring if he did not always grant their particular and various desires. They remembered not his hand How strong it is, and how it had been stretched out for them; or the great and glorious works of his hand on their behalf. Nor the day That remarkable and never to be forgotten day, that self-same day, as it is called, Exodus 12:41, which God had fixed four hundred years before, Genesis 15:13; when he delivered them from the enemy Namely, from their greatest enemy, the tyrant Pharaoh, that zealously and unweariedly sought their ruin. There are some days, made remarkable by signal deliverances, which ought never to be forgotten; for the remembrance of them is calculated to encourage us in our greatest straits.