Charles Ellicott Commentary 1 Kings 1:9

"And Adonijah slew sheep and oxen and fatlings by the stone of Zoheleth, which is beside En-rogel; and he called all his brethren, the king`s sons, and all the men of Judah, the king`s servants:" — 1 Kings 1:9 (ASV)

The stone of Zoheleth.—The meaning is uncertain. The derivation seems to be from a root, meaning to “crawl,” or “steal on.” Some interpreters render, the “stone of the serpents;” the Targums make it “the rolling stone;” other authorities “the stone of the conduit,” which would suit well its position as here described.

En-rogel. —“The spring of the fuller.” (Joshua 18:16; 2 Samuel 17:17.) Its proximity would be useful for the purposes of sacrifice; for it appears to be the only natural spring near Jerusalem, situated not far from Siloam.