Jeremiah 8:7 (Amplified Bible)

Even the migratory birds are punctual to their seasons. Yes, the stork excelling in the great height of her flight in the heavens knows her appointed times of migration, and the turtledove, the swallow, and the crane observe the time of their return. But My people do not know the law of the Lord which the lower animals instinctively recognize in so far as it applies to them.