Charles Ellicott Commentary 1 Kings 1:42

"While he yet spake, behold, Jonathan the son of Abiathar the priest came: and Adonijah said, Come in; for thou art a worthy man, and bringest good tidings." — 1 Kings 1:42 (ASV)

Jonathan the son of Abiathar: See 2 Samuel 15:27; 2 Samuel 17:17–21, where he is named, with Ahimaaz, as a swift runner, fit to be a messenger. It is curious that a similar greeting to his companion Ahimaaz is used by David in 2 Samuel 18:27 — possibly as a kind of omen of good fortune.