According to the author of the book, when the king heard sad news, all his sons and helpers cried a lot. It was a very big and loud cry because everyone was very upset.
2 Samuel 13:36: And it came to pass, as soon as he had made an end of speaking, that, behold, the king's sons came, and lifted up their voice and wept: and the king also and all his servants wept very sore. [very...: Heb. with a great weeping greatly]
2 Samuel 13:36 describes chaos and grief in David's household, while 1 Corinthians 14:33 states that God is not the author of confusion but of peace.
1 Corinthians 14:33: For God is not [the author] of confusion, but of peace, as in all churches of the saints. [confusion: Gr. tumult, or, unquietness]