They went into the inner part of the house as if to get some wheat, and they stabbed him in the stomach. Then Rekab and his brother Baanah slipped away.
NIV
And they came into the interior of the house as though they were delivering wheat, and they smote him in the body; and Rechab and Baanah his brother escaped.
AMP
And they came thither into the midst of the house, as though they would have fetched wheat; and they smote him under the fifth rib: and Rechab and Baanah his brother escaped.
KJV
"You are not the one to take the news today," Joab told him. "You may take the news another time, but you must not do so today, because the king's son is dead."
NIV
Joab told him, You shall not carry news today, but another time. Today you shall bear no news, for the king's son is dead.
AMP
And Joab said unto him, Thou shalt not bear tidings this day, but thou shalt bear tidings another day: but this day thou shalt bear no tidings, because the king's son is dead.
KJV
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.
NIV
Now when they had come into the house and he lay on his bed in his bedroom, they [not only] smote and slew him, [but] beheaded him and took his head and went by the way of the plain all night.
AMP
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.
KJV