'Certain' in the Bible

I’m certain my lord the king would not have let this happen without letting your servant know who will sit on my lord the king’s throne after him.”

Now a certain old prophet was living in Bethel. His son came and told him all the deeds that the man of God had done that day in Bethel. His sons also told their father the words that he had spoken to the king.

for the word that he cried out by a revelation from the Lord against the altar in Bethel and against all the shrines of the high places in the cities of Samaria is certain to happen.”