King James Version
For when they came into the house, he lay on his bed in his bedchamber, and they smote him, and slew him, and beheaded him, and took his head, and gat them away through the plain all night.English Standard Version
When they came into the house, as he lay on his bed in his bedroom, they struck him and put him to death and beheaded him. They took his head and went by the way of the Arabah all night,New International Version
They had gone into the house while he was lying on the bed in his bedroom. After they stabbed and killed him, they cut off his head. Taking it with them, they traveled all night by way of the Arabah.