Genesis 4:10

so that upon you may fall the guilt of all the righteous blood shed on earth, from the blood of righteous Abel to the blood of Zechariah, the son of Berechiah, whom you murdered between the sanctuary and the altar.

By faith Abel offered to God a better sacrifice than Cain, through which he was approved as being righteous—God approving his gifts—and through faith, though he is dead, he still speaks.

and to Jesus, the mediator of a new covenant, and to the sprinkled blood, which speaks better than the blood of Abel.