C. F. Keil and Franz Delitzsch on 1 Kings 16:9-11

1Ki 16:9-11 Zimri, the commander of the half of his war-chariots, conspired against him, and not only slew him, when he was intoxicated (שׁכּור שׁתה) at a drinking bout in the house of Arza, the prefect of his palace, but after ascending the throne exterminated the whole family of Baasha to the very last man. The prefect of the palace was no doubt a party to the conspiracy, and had probably arranged the drinking bout in his house for the purpose of carrying it out. “He did not leave him בּקיר משׁתּין (see at 1Ki 14:10), either his avengers (גּאליו, blood-relations, who might have avenged his death) or his friends.” These words simply serve to explain בּקיר משׁתּין, and show that this phrase is to be understood as relating to males only.