2 Samuel 23:15-17

The Voice

¹⁶ So these three mighty men broke through the nearby camp of the Philistines, drew water from the Bethlehem well that was by the gate, and brought it back for David. But he would not drink it; instead he poured it out, although he was parched with thirst, as a drink offering to the Eternal One.

So he did not drink it. This is the kind of thing the three mighty men did for David.