Revelation: a central and dynamic concept in both OT and NT.
In the NT Jesus preaches the word (Mark 2: 2).
In Paul and Acts (e.g. 6: 2), the word means the Christian proclamation.
Concluding a public reading of Scripture with the affirmation ‘This is the word of the Lord’ may be inappropriate, if, for example, it should follow an OT passage which is blood-thirsty, priggish, or otherwise disagreeable, unlike the unambiguous Cranmerian ‘Here ends the (lesson)’.