In the Book of Genesis, we read about the first murder that took place and it took place between two brothers, Cain and Abel.
Cain was bad, but Able was good. If you want to read the whole story you will find it in the Bible in Genesis chapter four, but I am going to include some of it here for you now.
“And Adam knew Eve his wife; she conceived and bare Cain, and said I have gotten a man from the LORD. And she again bare his brother Able. And Able was a keeper of sheep, but Cain was a tiller of the ground. And in process of time it came to pass, that Cain brought of the fruit of the ground an offering unto to the LORD. And Abel, he also brought of the firstlings of his flock and of the fat thereof. And the LORD had respect unto Abel and to his offering: But unto Cain and to his offering he had not respect. And Cain was very wroth, and his countenance fell. And the LORD said unto Cain, Why art thou wroth? And why is thy countenance fallen? If thou doest well, shalt thou not be accepted? And if thou doest not well, sin lieth at the door. And unto thee shall be his desire, and thou shalt rule over him. 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. And the LORD said unto Cain, Where is Abel thy brother? And he said I know not: Am I my brother’s keeper? And he said, what hast thou done? The voice of thy brother’s blood crieth unto Me from the ground. And now art thou cursed from the earth, which hath opened her mouth to receive thy brother’s blood form thy hand; When thou tillest the ground, it shall not henceforth yield unto thee her strength; a fugitive and the vagabond shalt thou be in the earth.” -Genesis 4:1-13
So, Adam and Eve’s firstborn son Cain killed his own brother and was the first murderer in the world.
He was angry because the Lord had respect for Abel’s offering, but not for his offering.
Cain had sin in his life and that was why his offering was not acceptable unto the Lord.
That’s why it’s important to not have sin in our lives. If you do not know what sin is, it is the transgression of the God’s law or the Ten Commandments (1 John 3:4). You can also read the Ten Commandments in the Bible in Exodus chapter 20.
So, that is the story of Cain & Abel and the lesson to be learned from it.
If you want to read more, just get the book, the Holy Bible.