Expository Preaching
Exposition refers to the content of the sermon (biblical truth) rather than its style (a running commentary). It seeks the original God-intended meaning of Scripture. The main idea of an expository sermon the topic, the divisions of that idea, main points, and the development of those divisions, all come from truths the text itself contains. No significant portions of the text is ignored. In other words, expositors willingly stay within the boundaries of the text and do not leave until they have surveyed its entirety with its hearers. To expound Scripture is to bring out of the text what is there and expose it to view. The expositor opens what appears to be closed, makes plain what is obscure, unravels what is knotted, and unfolds what is tightly packed.
Expository preaching grounds the message in the text so that all the sermon’s points are the points in the text, and it majors in the texts’s major ideas. It aligns the interpretation of the text with the doctrinal truths of the rest of the Bible (being sensitive to systematic theology). And it always situates the passage within the Bible’s narrative, showing how Christ is the final fulfillment of the text’s theme (being sensitive to biblical theology)
(https://www.thegospelcoalition.org/blogs/erik-raymond/what-is-expository-preaching/, Christ-Centered Preaching: Redeeming the Expository Sermon by Bryan Chapell (2005), Between Two Worlds: The Challenge of Preaching Today by John Stott (1982), Preaching: Communicating Faith in an Age of Skepticism by Timothy Keller (2016))