'Introduction' in the Bible
He brought the letter to king of Israel. It read: "This is a letter of introduction for my servant Naaman, whom I have sent to be cured of his skin disease."
through whom also we have obtained our introduction by faith into this grace in which we stand; and we exult in hope of the glory of God.
For it is through Him that we both have a [direct] way of approach in one Spirit to the Father.
(for the law perfected nothing,) and the introduction of a better hope by which we draw nigh to God.