Bible Verses About Sin: Entered into the world by Adam

When the woman saw that the tree was good for food, that it had a pleasing appearance and that the tree was desirable for making one wise, she took some of its fruit and ate. She also gave some to her husband, who was with her; and he ate.

Then the eyes of both of them were opened, and they realized that they were naked. So they sewed fig leaves together to make themselves loincloths.

Here is how it works: it was through one individual that sin entered the world, and through sin, death; and in this way death passed through to the whole human race, inasmuch as everyone sinned.