Judges 19:29 And when he was come into his house, he took a knife, and laid hold on his concubine, and divided her, together with her bones, into twelve pieces, and sent her into all the coasts of Israel.
The just of it is this guy and his concubine are walking around the city and end up staying with this Levite. So this group comes to the door wanting to have sex with the man. The Levite didn’t want that to happen so he did what any reasonable man would do. He offered to let the crowd rape his virgin daughter.
For some reason that wasn’t good enough. They still want the man. So they decided to give them the concubine. They take the deal. She is brutally raped and left to die on the door step
So the concubine’s husband finds her and realizes she is dead. So again, he does what any reasonable man would do. He takes the body, cuts it up in 12 pieces and sends each piece to a separate section of Israel.
I can’t even guess what this sick piece of crap story is in there for. It’s totally just added in, doesn’t seem to have a point, and is just full of insanity. The next chapter this husband gets everyone all riled up for a war. But really, would you listen to a man who just sent you a chunk of his dead wife? I’d just write him off as bat shit crazy and let it go.