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The author uses the biblical allusion of David and Goliath to describe Red Chief's attack on Bill with a slingshot. The comparison highlights Red Chief's bravery and cunning, despite his young age, and suggests that he is capable of being victorious even against larger and more experienced opponents, just like David was against Goliath. The allusion contributes to the connotation of the text by creating a sense of humor and irony, as the two kidnappers, who thought they had control over the situation, are now being outsmarted and overpowered by a young boy.