God punished Cain: When you work the ground, it will no longer yield its crops for you. Genesis 4:12

The Book of Genesis tells a fascinating story about how original sin entered the world through the sin of Adam and Eve in the Garden of Eden, and how from that moment on, evil only increased until the arrival of the Great Flood with Noah and his ark.
And as a consequence of the problem of evil, the Book of Genesis in its teachings relates the story of Cain and Abel, the first sons of Adam and Eve. The main purpose of this story between these two brothers is to teach that men have to choose between two paths, sin or the fear of God (constancy, firmness, devotion), or, expressed in another way, men have to choose between growing an inner heart of stone or a heart of flesh. The story of Cain and Abel is basically a foreshadowing of the entire synthesis of the sapiential literature, which begins with the teaching of Psalm 1, the psalm of the two paths: "The righteous are guided and protected by the LORD, but the evil are on the way to their doom" Psalm 1:6.
In the tale, God may superficially appear to be a spiritual being subject to human passions, but in reality, God showed his wisdom to the children of Adam and Eve, because before Cain sinned, God allowed him reflection and counseled him, and yet Cain chose error. This story of the Book of Genesis ultimately serves as a warning about the consequences of choosing the wrong path in life, the path of error is not a path of blessing and happiness.
The Bible begins its story by explaining that Abel was a shepherd and Cain a farmer. Then it happened that Abel's offering pleased God, but Cain's did not. Then God saw Cain bowed down and resentful and advised him to do good and overcome the sin that stalked him. But Cain did not listen to God and took Abel's life out of envy. Then God punished Cain for his sin and said: "When you work the ground, it will no longer yield its crops for you. You will be a restless wanderer on the earth" Genesis 4:12.
The Bible concludes that God put a mark on Cain so that no one would kill him, and thus Cain distanced himself from God's presence. It is worth noting that Cain received for his sin the loss of settled life and became a nomad, a curse that would later be expressed in the Book of Deuteronomy for those disobedient to the law of Moses.
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