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.
And the Lord said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper?Genesis 4: 8-9
King James Bible - 1611
This bas-relief in Berlin's Bode Museum is a graphic depiction of the moment when Cain strikes out against his brother. Though it has been seriously damaged, there is really no need to do anything other than imagine the violent action of Cain's right arm. Even without it the faces tell us the whole story.
Cain's face is twisted in anger at the Lord's rejection of his sacrifice and hatred for his younger brother. Even in profile it betrays the violence of the act he is about to commit.
21 novembre - La Presentazione della Beata Vergine Maria