Joab said unto the king - This very bad man saw that the measure now recommended by the king was a wrong one, and might be ruinous to the people, and therefore he remonstrates against it in a very sensible speech; but the king was infatuated, and would hear no reason.

And Joab said unto the king,.... Not so rudely and insolently as he did on account of his mourning for Absalom, but in a more modest, decent, and polite manner:

now the Lord thy God add unto the people (how many soever they be) an hundredfold; he wished his subjects were an hundred times more numerous than they were:

and that the eyes of my lord the king may see it; that he might live to see with his own eyes so great an increase:

but why doth my lord the king delight in this thing? he being now old, and therefore it might seem strange to indulge such curiosity, pride, and vanity, and besides quite needless and useless: the numbering of them would not make them more or less; and they were all the king's servants, who were ready to obey him whenever he needed them, whether numbered or not; and it might be prejudicial to them, and bring down the wrath of God upon them, as well as be a troublesome and expensive business; all which, though not expressed here, is hinted at in Ch1 21:3.