“And Jesus answering them began to say, Take heed lest any man deceive you:” Mark 13:5 KJV
Let no one deceive you with vain words. Mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them. For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.
Let no man deceive himself. If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise.
1 Corinthians 3:18 KJV
Be not deceived: evil communications corrupt good manners.
1 Corinthians 15:33 KJV
Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
Ephesians 4:13-14 KJV
If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man’s religion is vain.
Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.
James 1:26-27 KJV