There is a grievous evil I have seen under the sun: wealth hoarded to the harm of its owner,
Solomon had shown the vanity of pleasure, gaiety, and fine works, of honour, power, and royal dignity; and there is many a covetous worldling that will agree with him, and speak as slightly as he does of these things; but money, he thinks, is a substantial thing, and if he can but have enough of that he is happy.
Commenting on Ecclesiastes 5:9-17
There is a sore evil which I have seen under the sun,.... Or "an evil sickness" (m). A sinful disease in the person with whom it is found, and very disagreeable to others to behold; it is enough to make one sick to see it; and what he is about to relate he himself was an eyewitness of: namely, riches kept for the owners thereof...
Proofs of God's judgments even in this world (Pro 11:31). The rich oppressor's wealth provokes enemies, robbers, &c. Then, after having kept it for an expected son, he loses it beforehand by misfortune ("by evil travail"), and the son is born to be heir of poverty. Ecc 2:19, Ecc 2:23 gives another aspect of the same subject.