Hebrews 2:1-3

So we must be more careful to follow what we were taught. Then we will not stray away from the truth. The teaching God spoke through angels was shown to be true, and anyone who did not follow it or obey it received the punishment that was earned. So surely we also will be punished if we ignore this great salvation. The Lord himself first told about this salvation, and those who heard him testified it was true.