I also saw under the sun this example of wisdom that greatly impressed me:
And Moses went out, and told the people the words of the LORD, and gathered the seventy men of the elders of the people, and set them round about the tabernacle.Numbers 11:24 KJV
There was once a small city with only a few people in it. And a powerful king came against it, surrounded it and built huge siege works against it.Ecclesiastes 9:14 NIV
Moreover, no one knows when their hour will come: As fish are caught in a cruel net, or birds are taken in a snare, so people are trapped by evil times that fall unexpectedly upon them.Ecclesiastes 9:12 NIV