There is a great deal of vanity and folly, as in multitude of dreams, which for the most part are vain and insignificant, so also in many words, i.e. in making many vows, whereby a man is exposed to many snares and temptations. Fear thou God; fear the offence and wrath of God, and therefore be sparing in making vows, and just in performing them; whereby he implies that this rashness in vowing, and slackness in performing vows, proceed from the want of a just reverence and dread of the Divine Majesty, who is immediately concerned in these matters.
Related Commentaries of Ecclesiastes 5:7
Ecclesiastes 5:7
7 For in the multitude of dreams and many words there are also divers vanities: but fear thou God.