GOD'S WORD® Translation
They should go to the teachings and to the written instructions. If people don't speak these words, it is because it doesn't dawn on them.

American Standard Version
To the law and to the testimony! if they speak not according to this word, surely there is no morning for them.

Berean Study Bible
To the law and to the testimony! If they do not speak according to this word, they have no light of dawn.

Douay-Rheims Bible
To the law rather, and to the testimony. And if they speak not according to this word, they shall not have the morning light.

English Revised Version
To the law and to the testimony! if they speak not according to this word, surely there is no morning for them.

King James Bible
To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.

World English Bible
Turn to the law and to the testimony! If they don't speak according to this word, surely there is no morning for them.

Young's Literal Translation
To the law and to the testimony! If not, let them say after this manner, 'That there is no dawn to it.'

Isaiah 8:20 Additional Translations ...