John Gill Bible Commentary

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 may be said to take them by the hands of Abishai: and they gat them away; with the above things along with them: and no man saw it, nor knew it; saw them in the camp, or knew what they did: neither awaked; at their talking together, at the motion of their feet, and taking away the spear and cruse: for they were all asleep; which was very extraordinary, that among three thousand men none should be awake, not even the sentinels; which might seem impossible in a natural way, but it is accounted for by what follows: because a deep sleep from the Lord was fallen upon them; or "a sleep of the Lord" (p); a very great one, an uncommon one; so great trees, mountains, &c. are called trees and mountains of God; or, according to our supplement, it was from the Lord, he was the cause and author of it; he cast them into this sleep, or caused it to fall upon them, and locked them up in it, that they might not hear David and his servant when they came among them. (p) , "sopor Domini", V. L. Montanus, Munsterus "altus sopor Jehovae", Junias & Tremellius, Piscator.