What does 2 Samuel 17:13 mean?

Even he who is valiant, whose heart is as the heart of a lion, will utterly melt; for all Israel knows that your father is a mighty man, and those who are with him are valiant men.

But I counsel that all Israel be gathered together to you, from Dan even to Beersheba, as the sand that is by the sea for multitude; and that you go to battle in your own person.

So shall we come on him in some place where he shall be found, and we will light on him as the dew falls on the ground; and of him and of all the men who are with him we will not leave so much as one.

Absalom and all the men of Israel said, “The counsel of Hushai the Archite is better than the counsel of Ahithophel.” For Yahweh had ordained to defeat the good counsel of Ahithophel, to the intent that Yahweh might bring evil on Absalom.

Then Hushai said to Zadok and to Abiathar the priests, “Ahithophel counseled Absalom and the elders of Israel that way; and I have counseled this way.

Now therefore send quickly, and tell David, saying, ‘Don’t lodge tonight at the fords of the wilderness, but by all means pass over; lest the king be swallowed up, and all the people who are with him.’”