Charles Ellicott Commentary 2 Samuel 18:3

"But the people said, Thou shalt not go forth: for if we flee away, they will not care for us; neither if half of us die, will they care for us: but thou art worth ten thousand of us; therefore now it is better that thou be ready to succor us out of the city." — 2 Samuel 18:3 (ASV)

Now thou art worth ten thousand of us. —The Hebrew text reads now, but without thou, and as it stands must be translated, now there are ten thousand like us; but the change of a single letter alters the word now into thou, and this change should unquestionably be made in accordance with the Septuagint and Vulgate, followed by the English. The people urge truly that David is the very centre of their whole cause, and suggest that, even while avoiding unnecessary exposure, he may yet be equally helpful by keeping a reserve in the city to help them in case of need.