Genesis 4:7-9

Complete Jewish Bible

⁷ If you are doing what is good, shouldn’t you hold your head high? And if you don’t do what is good, sin is crouching at the door — it wants you, but you can rule over it.” ⁸ Kayin had words with Hevel his brother; then one time, when they were in the field, Kayin turned on Hevel his brother and killed him.

⁹ Adonai said to Kayin, “Where is Hevel your brother?” And he replied, “I don’t know; am I my brother’s guardian?”