John Gill Commentary 1 Chronicles 11:18

"And the three brake through the host of the Philistines, and drew water out of the well of Beth-lehem, that was by the gate, and took it, and brought it to David: but David would not drink thereof, but poured it out unto Jehovah," — 1 Chronicles 11:18 (ASV)

(See Gill on 1 Chronicles 11:1)