Genesis 4
2 And again, she bore his brother Abel. Now Abel was a keeper of sheep, and Cain a worker of the ground.

4 and Abel also brought of the firstborn of his flock and of their fat portions. And the LORD had regard for Abel and his offering,

8 Cain spoke to Abel his brother. And when they were in the field, Cain rose up against his brother Abel and killed him.

9 Then the LORD said to Cain, "Where is Abel your brother?" He said, "I do not know; am I my brother's keeper?"

25 And Adam knew his wife again, and she bore a son and called his name Seth, for she said, "God has appointed for me another offspring instead of Abel, for Cain killed him."

 

Matthew 23
35 so that on you may come all the righteous blood shed on earth, from the blood of innocent Abel to the blood of Zechariah the son of Barachiah, whom you murdered between the sanctuary and the altar.

Luke 11
51 from the blood of Abel to the blood of Zechariah, who perished between the altar and the sanctuary. Yes, I tell you, it will be required of this generation.

Hebrews 11
4 By faith Abel offered to God a more acceptable sacrifice than Cain, through which he was commended as righteous, God commending him by accepting his gifts. And through his faith, though he died, he still speaks.

Hebrews 12
24 and to Jesus, the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.