After this the son of the woman, the mistress of the house, became ill; his illness was so severe that there was no breath left in him. She then said to Elijah, “What have you against me, O man of God? You have come to me to bring my sin to remembrance, and to cause the death of my son!” But he said to her, “Give me your son.” He took him from her bosom, carried him up into the upper chamber where he was lodging, and laid him on his own bed. He cried out to the LORD, “O LORD my God, have you brought calamity even upon the widow with whom I am staying, by killing her son?” Then he stretched himself upon the child three times, and cried out to the LORD, “O LORD my God, let this child’s life come into him again.” The LORD listened to the voice of Elijah; the life of the child came into him again, and he revived. Elijah took the child, brought him down from the upper chamber into the house, and gave him to his mother; then Elijah said, “See, your son is alive.” So the woman said to Elijah, “Now I know that you are a man of God, and that the word of the LORD in your mouth is truth.” (1 Kings 17:17-24, NRSV)
What do you need to know that a person is speaking for God?
This woman needed to see her son raised from the dead. She may not have know that, but after Elijah did that, she believed he was from God.
So what do you need to know a person is from God, or is speaking God’s truth?