Genesis 4:8

4:8 Cain said to Abel, his brother, "Let's go into the field." It happened, when they were in the field, that Cain rose up against Abel, his brother, and killed him.
-World English Bible

Other Translation

4:8 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.
-King James Version