Genesis 4:9

Then the Lord said to Cain , Where is Abel your brother ? He said , I do not know ; am I my brother’s keeper ?

Then the Lord said to Cain, “Where is your brother Abel?” “I don`t know,” he replied. “Am I my brother`s keeper?”

And the Lord said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper?