GOD'S WORD® Translation
Be careful, brothers and sisters, that none of you ever develop a wicked, unbelieving heart that turns away from the living God.

American Standard Version
Take heed, brethren, lest haply there shall be in any one of you an evil heart of unbelief, in falling away from the living God:

Berean Study Bible
See to it, brothers, that none of you has a wicked heart of unbelief that turns away from the living God.

Douay-Rheims Bible
Take heed, brethren, lest perhaps there be in any of you an evil heart of unbelief, to depart from the living God.

English Revised Version
Take heed, brethren, lest haply there shall be in any one of you an evil heart of unbelief, in falling away from the living God:

King James Bible
Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.

World English Bible
Beware, brothers, lest perhaps there be in any one of you an evil heart of unbelief, in falling away from the living God;

Young's Literal Translation
See, brethren, lest there shall be in any of you an evil heart of unbelief in the falling away from the living God,

Hebrews 3:12 Additional Translations ...