'Trustworthy' in the Bible

You have commanded your statutes in righteousness. They are fully trustworthy.

One who brings gossip betrays a confidence, but one who is of a trustworthy spirit is one who keeps a secret.

A wicked messenger falls into trouble, but a trustworthy envoy gains healing.

Now concerning virgins, I have no commandment from the Lord, but I give my judgment as one who has obtained mercy from the Lord to be trustworthy.