1 Kings 1:33 - Ellicott's Commentary On The Whole Bible

Gihon (“breaking forth”) is clearly a place in the valley, under the walls of Jerusalem, mentioned as having a watercourse, or torrent, diverted by Heżekiah in his preparation of the city for siege (2 Chronicles 32:30), and as forming one end of a new wall “up to the fish gate,” built by Manasseh; but whether it is on the west of the city, near the present Jaffa gate, or (as seems more probable) on the south, at the end of the valley called the Tyropœon, running through the city, has been doubted. The Targums here read Siloam; and this agrees with the latter supposition, which is also supported by the proximity to Adonijah’s feast at En-rogel, implied in the narrative.