Genesis 3 - The First Sin, the Curse, and Banishment

A crafty serpent tricked Eve into doubting that she will die if she ate from the tree of knowledge; she would actually be "like God". Adam was present, so they both ate the fruit. They realized, with their new knowledge, that they were shamefully naked, so they made fig-leaf clothes and hid from God. When confronted by God for their disobedience, Adam blamed Eve (and God for making her). Eve blamed the serpent.

God cursed all three:

• Serpents will crawl on their bellies and eat dust and be hated by women. People will crush his head while he bites heels.
• Women will have painfully childbearing and want to control their husbands, which will cause strife
• Men will have to always work and work hard to acquire food, until we die and turn back into dust.

God made them some clothes, but banished them from the Garden of Eden so they could no longer eat from the tree of life to live forever.