What does 1 Chronicles 11:18 mean?

The three broke through the Philistine lines, drew water from the well by the gate in Bethlehem, and brought it back to David. But David wouldn’t drink it. Instead, he poured it out to God. 1 Chronicles 11:18 - Modern Text Bible

(The men’s loyalty was so great that they risked everything for David’s wish, but David saw their act as so sacred he offered the water to God instead of drinking it.)