King James Bible: Idioms-1 (My Brother's Keeper)

Many common English phrases and idioms come from the King James Bible. One of these is from the Book of Genesis: "Am I my brother's keeper?" "Am I my brother's keeper" is especially elegant because of the rhythm. Notice how short and long syllables alternate:

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. 4:9 And the LORD said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper?

 Creative Commons (Wikipedia): Cathedral in Milan, Italy. Statues of Cain and Abel. Picture by Giovanni Dall'Orto

This last phrase has become an English idiom which means as God’s children, are we responsible for taking care of other people?