30 While they were on their way, the report came to David: “Absalom has struck down all the king’s sons; not one of them is left.”

Read 2 Samuel 13:30 Using Other Translations

And it came to pass, while they were in the way, that tidings came to David, saying, Absalom hath slain all the king's sons, and there is not one of them left.
While they were on the way, news came to David, "Absalom has struck down all the king's sons, and not one of them is left."
As they were on the way back to Jerusalem, this report reached David: “Absalom has killed all the king’s sons; not one is left alive!”