Genesis 4:9

9 And the Lord said to Cain, Where is Abel thy brother? Which answered, I know not; whether I am the keeper of my brother? (And the Lord said to Cain, Where is thy brother Abel? And he answered, How do I know; am I my brother's keeper?)

Genesis 4:9 Meaning and Commentary

Genesis 4:9

And the Lord said unto Cain, where is Abel thy brother?
&c.] Perhaps this was said to him the next time he came to offer, he not being with him: this question is put, not as being ignorant where he was, but in order to bring Cain to a conviction and confession of his sin, to touch his conscience with it, and fill it with remorse for it; and, for the aggravation of it, observes the relation of Abel to him, his brother: and he said, I know not;
which was a downright lie; for he must know where he had left him or laid him: this shows him to be under the influence of Satan, who was a liar, and the father of lies, as well as a murderer from the beginning; and that he was so blinded by him, as to forget whom he was speaking to; that he was the omniscient God, and knew the wickedness he had done, and the falsehood he now delivered, and was capable of confronting him with both, and of inflicting just punishment on him. [Am] I my brother's keeper?
which was very saucily and impudently spoken: it is not only put by way of interrogation, but of admiration, as Jarchi observes, as wondering at it, that God should put such a question to him, since he knew he had not the charge of his brother, and his brother was at age to take care of himself; and if not, it rather belonged to God and his providence to take care of him, and not to him: so hardened was he in his iniquity, he had stretched out his hand against his brother, and now he stretched it out against God, and ran upon him, even on the thick bosses of his buckler.

Genesis 4:9 In-Context

7 Whether not if thou shalt do well, thou shalt receive well; but if thou doest evil, thy sin shall be present anon in the gates? but the desire thereof, that is, of sin, shall be under thee, and thou shalt be lord thereof. (If thou shalt do well, then thou shalt be accepted; but if thou doest evil, then at once thy sin shall be present at the gates, and the desire of sin shall take thee under, and so thou must be lord of it, or rule over it.)

8 And Cain said to Abel, his brother, Go we out (But then Cain said to his brother Abel, Walk with me). And when they were in the field, Cain rose (up) against his brother Abel, and killed him.

9 And the Lord said to Cain, Where is Abel thy brother? Which answered, I know not; whether I am the keeper of my brother? (And the Lord said to Cain, Where is thy brother Abel? And he answered, How do I know; am I my brother's keeper?)

10 And God said to Cain, What hast thou done? the voice of the blood of thy brother crieth to me from [the] earth (the voice of thy brother's blood crieth out to me from the earth).

11 Now therefore thou shalt be cursed on [the] earth, that opened his mouth, and received of thine hand the blood of thy brother. (And so now thou shalt be cursed on the earth, that hath opened its mouth, and received thy brother's blood from thy hand.)