You know Abner the son of Ner, that he came to deceive you, and to know your going out and your coming in, and to know all that you do.
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George Leo Haydock
AD 1849
Dost. This explains going out (Haydock)
Joab pretends to be wholly solicitous for the king's welfare. But he was afraid lest Abner should take his place, and he also desired to revenge Asael's death. (Menochius)