Genesis 4

The first murder is recorded- Cain kills his brother Abel (v.8)

Sin overpowered Cain even though God said you must rule over it. (v.7)

Am I my brother's keeper?- Cain lied to God. (v.9)

Even though he lied, God still knew what had happened. You can't hide anything from God. (v.10)

The first time people began to call upon the name of the Lord was during the time of Enosh, Seth's son. (v.26)