Adonijah, one of the sons of David, sets himself up to be the King of Israel. However he was a pretender who constantly sought to take short-cuts. This passage reminds us that, in God’s kingdom, we don’t need more pretenders.
You can read the written sermon here:
https://www.sermoncentral.com/sermons/2-we-don-t-need-more-pretenders-allan-quak-sermon-on-david-200221?ref=SermonSeriesDetails