Jamieson, Fausset and Brown on 1 Kings 1:41-49

41-49. Adonijah and all the guests that were with him heard it as they had made an end of eating--The loud shouts raised by the populace at the joyous proclamation at Gihon, and echoed by assembled thousands, from Zion to En-rogel, were easily heard at that distance by Adonijah and his confederates. The arrival of a trusty messenger, who gave a full detail of the coronation ceremony [1Ki 1:43-48], spread dismay in their camp. The wicked and ambitious plot they had assembled to execute was dissipated, and every one of the conspirators consulted his safety by flight.

1Ki 1:50-53. Adonijah, Fleeing to the Horns of the Altar, Is Dismissed by Solomon.