Jeremiah 20:9

Then I said, or, "If I said," I will not make mention of Him, nor speak any more in His name, in trying to escape the unpleasant experiences which attached to his fearless testifying, but His Word was in mine heart as a burning fire shut up in my bones, which, without an outlet, would surely consume him, for which reason he must reveal what was communicated to him, and I was weary with forbearing, with refraining from testifying for the Lord, and I could not stay. He now states the reason for not keeping his resolve to hold his peace concerning the message of Jehovah.