For a dream comes with much business, and a fool’s voice with many words.
Solomon's design, in driving us off from the world, by showing us its vanity, is to drive us to God and to our duty, that we may not walk in the way of the world, but by religious rules, nor depend upon the wealth of the world, but on religious advantages; and therefore, I.
Commenting on Ecclesiastes 5:1-3
For a dream cometh through the multitude of business,.... Or, "for as a dream" (q), so Aben Ezra; as that comes through a multiplicity of business in the daytime, in which the mind has been busied, and the body employed; and this brings on dreams in the night season, which are confused and incoherent; sometimes the fancy is employed about one thing, and sometimes another...
As much "business," engrossing the mind, gives birth to incoherent "dreams," so many words, uttered inconsiderately in prayer, give birth to and betray "a fool's speech" (Ecc 10:14), [HOLDEN and WEISS]. But Ecc 5:7 implies that the "dream" is not a comparison, but the vain thoughts of the fool (sinner, Psa 73:20), arising from multiplicity of (worldly) "business." His "dream" is that God hears him...