'Token' in the Bible

“Ask a sign for yourself from the Lord your God [one that will convince you that God has spoken and will keep His word]; make your request as deep as Sheol or as high as heaven.”

And the Lord said, “Even as My servant Isaiah has gone naked and barefoot three years as a sign and token against Egypt and Cush,

Don't listen to Hezekiah!' For this is what the king of Assyria says, 'Send me a token of your submission and surrender to me. Then each of you may eat from his own vine and fig tree and drink water from his own cistern,