Hebrews

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 3:13
"But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin."

Hebrews 3:14
"For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;"