Matthew 23:35
that upon you may come all the righteous blood poured out upon the earth, from the blood of Abel, the righteous, unto the blood of Zachariah, son of Barachiah, whom ye slew between the temple and the altar.
Hebrews 11:4
By faith Abel offered to God a more excellent sacrifice than Cain, through which he received witness that he was righteous, God testifying of his gifts; and through it he, being dead, is still speaking.
1 John 3:12
not as Cain who was of the evil one, and slew his brother. And wherefore did he slay him? Because his own works were evil, and his brother's righteous.
Hebrews 12:24
and to Jesus, the Mediator of a new covenant, and to the blood of sprinkling, speaking better things than Abel.