'Token' in the Bible

And Jehovah saith to him, 'Therefore -- of any slayer of Cain sevenfold it is required;' and Jehovah setteth to Cain a token that none finding him doth slay him.

And God said, This is the token of the covenant which I make between me and you and every living creature that is with you, for perpetual generations:

I do set my bow in the cloud, and it shall be for a token of a covenant between me and the earth.

And God said unto Noah, This is the token of the covenant, which I have established between me and all flesh that is upon the earth.

And ye shall circumcise the flesh of your foreskin; and it shall be a token of the covenant betwixt me and you.