Are all Dreams from God?

Yeshua stated in these end times there would be MANY false prophets and teachers.  One of the tools these false prophets and teachers use is false dreams. They say things like, "God spoke to me or God spoke to me through or dream . . . etc." Well the Bible states the following about dreams: "For when dreams increase and words grow many, there is vanity; but God is the one you must fear." (Ecclesiastes 5:7 ESV) "For in the multitude of dreams, and many words, there are also divers vanities,.... Or as, "in a multitude of dreams, there are many vanities, so also in a multitude of words" (s); as dreams are vain things, or there are abundance of vain things that come into the mind in dreams; so vain and idle are the many excuses which are made for the non-performance of vows; or there are many vain things which are uttered in making of them, or in long prayers to God; or in discourses concerning him; to all which is opposed the fear of God;  "but fear thou God; give no heed to dreams, nor to the many words of men, which are vain and foolish; but keep close to the word of God, and worship him internally and externally, in spirit and in truth; for herein lies the sum and substance of religion; see Ecc_12:13; The Targum is,  "for in the multitude of the dreams of the false prophets believe not, nor in the vanities of the authors of enchantments, and the many speeches of ungodly men; but serve the wise and just, and of them seek doctrine, and fear before the Lord." (John Gill Commentary)  "The fear of the LORD is hatred of evil. Pride and arrogance and the way of evil and perverted speech I hate." (Proverbs 8:13 ESV) It is true some dreams come from God. However, how can we verify whether the dream is true or false with the Bible (Acts 2:17)?