NASB 1995
"Now, O king, establish the injunction and sign the document so that it may not be changed, according to the law of the Medes and Persians, which may not be revoked."

American Standard Version
Now, O king, establish the interdict, and sign the writing, that it be not changed, according to the law of the Medes and Persians, which altereth not.

Berean Study Bible
Therefore, O king, establish the decree and sign the document so that it cannot be changed—in accordance with the law of the Medes and Persians, which cannot be repealed.”

Douay-Rheims Bible
Now, therefore, O king, confirm the sentence, and sign the decree: that what is decreed by the Medes and Persians may not be altered, nor any man be allowed to transgress it.

English Revised Version
Now, O king, establish the interdict, and sign the writing, that it be not changed, according to the law of the Medes and Persians, which altereth not.

King James Bible
Now, O king, establish the decree, and sign the writing, that it be not changed, according to the law of the Medes and Persians, which altereth not.

World English Bible
Now, O king, establish the decree, and sign the writing, that it not be changed, according to the law of the Medes and Persians, which doesn't alter.

Young's Literal Translation
Now, O king, thou dost establish the interdict, and sign the writing, that it is not to be changed, as a law of Media and Persia, that doth not pass away.'

Daniel 6:8 Additional Translations ...