Hebrews 3:12 in the World English Bible
Beware, brothers, lest perhaps there might be in any one of you an evil heart of unbelief, in falling away from the living God;
Context
11 So I sware in my wrath, They shall not enter into my rest.)
12 Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.
13 But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.