As soon as Zimri began to reign and was seated on the throne, he struck down the entire household of Baasha. He did not leave a single male, whether a kinsman or friend.
KJV
And it came to pass, when he began to reign, as soon as he sat on his throne, [that] he slew all the house of Baasha: he left him not one that pisseth against a wall, neither of his kinsfolks, nor of his friends.
ASV
And it came to pass, when he began to reign, as soon as he sat on his throne, that he smote all the house of Baasha: he left him not a single man-child, neither of his kinsfolks, nor of his friends.