Genesis 4:9 in the World English Bible
The LORD said to Cain, “Where is Abel, your brother?” He said, “I don’t know. Am I my brother’s keeper?”
Context
8 And Cain talked with Abel his brother: and it came to pass, when they were in the field, that Cain rose up against Abel his brother, and slew him.
9 And the LORD said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother’s keeper?
10 And he said, What hast thou done? the voice of thy brother’s blood crieth unto me from the ground.