Hebrews 12:23-24

23All God's people meet together there. They are like his most important sons. They belong in heaven because God has written down their names. You have come to God himself, who will judge all people. You have come to the place where the spirits of God's people are. Those people have become right with God. God has now finished his work in them.

24You have come to Jesus, who brought the new agreement from God to his people. In that agreement, the blood of Jesus' death makes us clean from our sins. It tells us that God has forgiven us. When Cain killed his brother Abel, Abel's blood brought God's punishment. So we see that Jesus' blood brought us something much better than that.