Hebrews 3:12

Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.
— Hebrews 3:12, King James Version

In other translations

World English Bible (WEB)

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

American Standard Version (ASV)

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:

Young's Literal Translation (YLT)

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