'Alter' in the Bible

Also I have made a decree, that whoever shall alter this word, let a beam be pulled out from his house, and let him be lifted up and fastened thereon; and let his house be made a dunghill for this:

and the God who has caused his name to dwell there overthrow all kings and peoples who shall put forth their hand to alter [the same], to destroy this house of God which is at Jerusalem. I Darius have made a decree; let it be done with all diligence.