1 Kings 17:24
"And the woman said to Elijah, Now by this I know that thou art a man of God, and that the word of the LORD in thy mouth is truth."
Cross References (ranked by relevance)
Now are we sure that thou knowest all things, and needest not that any man should ask thee: by this we believe that thou camest forth from God.
The same came to Jesus by night, and said unto him, Rabbi, we know that thou art a teacher come from God: for no man can do these miracles that thou doest, except God be with him.
This beginning of miracles did Jesus in Cana of Galilee, and manifested forth his glory; and his disciples believed on him.
For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God, which effectually worketh also in you that believe.
And I am glad for your sakes that I was not there, to the intent ye may believe; nevertheless let us go unto him.
The preacher sought to find out acceptable words: and that which was written was upright, even words of truth.
And I knew that thou hearest me always: but because of the people which stand by I said it, that they may believe that thou hast sent me.
If I had not done among them the works which none other man did, they had not had sin: but now have they both seen and hated both me and my Father.