Cross reference
Proverbs 30:1
1 The words of Agur the son of Jakeh, the oracle: The man says to Ithiel, To Ithiel and Ucal:
Proverbs 31:1
1 The words of king Lemuel; the oracle which his mother taught him.
2 Peter 1:19-21
19 We have the more sure word of prophecy; whereunto you do well that you take heed, as to a lamp shining in a dark place, until the day dawns, and the day star arises in your hearts:
20 knowing this first, that no prophecy of Scripture is of private interpretation.
21 For no prophecy ever came by the will of man: but holy men of God spoke, being moved by the Holy Spirit.