Salt

Essential preservative and seasoning: "salt of the covenant" and "salt of the earth".

Scripture

Leviticus 2:13

13 Every offering of your meal offering you shall season with salt; neither shall you allow the salt of the covenant of your God to be lacking from your meal offering. With all your offerings you shall offer salt.

Matthew 5:13

13 "You are the salt of the earth, but if the salt has lost its flavor, with what will it be salted? It is then good for nothing, but to be cast out and trodden under the feet of men.

Colossians 4:6

6 Let your speech always be with grace, seasoned with salt, that you may know how you ought to answer each one.

References