Here are some examples:
Mark 1:22
22 And they were astonished at his doctrine: for he taught them as one that had authority, and not as the scribes.
The scribes quote prophets and scripture trying to prove Church doctrine.
Christ taught truth.
Back to examples of the tongue of angels:
Helaman 5:18
18 And it came to pass that Nephi and Lehi did preach unto the Lamanites with such great power and authority, for they had power and authority given unto them that they might speak, and they also had what they should speak given unto them—
Helaman 6:5
5 Yea, and many did preach with exceedingly great power and authority, unto the bringing down many of them into the depths of humility, to be the humble followers of God and the Lamb.
Luke 4:36
36 And they were all amazed, and spake among themselves, saying, What a word is this! for with authority and power he commandeth the unclean spirits, and they come out.
Alma 17:3
3 But this is not all; they had given themselves to much prayer, and fasting; therefore they had the spirit of prophecy, and the spirit of revelation, and when they taught, they taught with power and authority of God.