Joseph M,
indeed the fruits means the teachings, or God's words ,
or, the way these "prophets" speak in the name of the Lord.
why ?
because Jesus commanded to his true followers
"What I tell you in the darkness, speak ye in the light; and what ye hear in the ear, proclaim upon the house-tops."
and also Peter has told to the "sheperds" 1 Peter 4:
11. If anyone speaks, he should do it as one speaking the very words of God. NIV
both "speaking the very words of God" and obeying them means "worshiping God"
by speaking incorectly "the very words of God" will result in disobeying "the very words of God"
this is sure
rus v.