So David took the spear and the jar of water from Saul’s head, and they went away. No man saw it or knew it, nor did any awake, for they were all asleep, because a deep sleep from the LORD had fallen upon them.
Here is, I. David's bold adventure into Saul's camp in the night, accompanied only by his kinsman Abishai, the son of Zeruiah. He proposed it to him and to another of his confidants (Sa1 26:6), but the other either declined it as too dangerous an enterprise, or at least was content that Abishai, who was forward to it, should run the risk of it rather than himself.
Commenting on 1 Samuel 26:6-12
So David took the spear, and the cruse of water, from Saul's bolster,.... Abishai either refusing to take them, since he might not take away his life; or it may be rather David thought better of it, and took them himself, lest Abishai should be tempted, when so near to Saul, and his spear in his hand, and should thrust him with it; though David...
DAVID STAYS ABISHAI FROM KILLING SAUL, BUT TAKES HIS SPEAR AND CRUSE. (1Sa. 26:5-25) Saul lay in the trench, and the people pitched round about him--Among the nomad people of the East, the encampments are usually made in a circular form. The circumference is lined by the baggage and the men, while the chief's station is in the center, whether he occupy a tent or not.
Commenting on 1 Samuel 26:5-25