Genesis 4:1-26
And Adam knew Eve his wife; and she conceived, and bore Cain, and said, I have gotten a man from the LORD.
Topicalbible.org—AKJV

Genesis 4:9
And the LORD said to Cain, Where is Abel your brother? And he said, I know not: Am I my brother's keeper?
Topicalbible.org—AKJV