Poured it out unto the Lord - To make libations, both of water and wine, was a frequent custom among the heathens. We have an almost similar account in Arrian's Life of Alexander: "When his army was greatly oppressed with heat and thirst, a soldier brought him a cup of water; he ordered it to be carried back, saying, I cannot bear to drink alone while so many are in want, and this cup is too small to be divided among the whole." Tunc poculo pleno sicut oblatum est reddito: Non solus, inquit, bibere sustineo, nec tam exiguum dividere omnibus possum. - Arrian, lib. vi.
The example was noble in both cases, but David added piety to bravery; he poured it out unto the Lord.

Was he not most honourable of three?.... He was; who, besides the exploit here mentioned, did many other things; he went down with David into Saul's camp, and took away his spear and cruse, which were at his bolster, Sa1 26:6; he relieved David when in danger from Ishbibenob the giant, Sa2 21:16; he beat the Edomites, and slew eighteen thousand of them in the valley of salt, Ch1 18:12,

therefore he was their captain; of the other two, or was head over them, took rank before them:

howbeit he attained not unto the first three; for fortitude, courage, and warlike exploits, namely, to the Tachmonite, Eleazar, and Shammah.