Ephesians 4:14 KJV

1 Corinthians 14:20 KJV
Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men.

1 John 4:1 KJV
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.

2 Corinthians 2:17 KJV
For we are not as many, which corrupt the word of God: but as of sincerity, but as of God, in the sight of God speak we in Christ.

Hebrews 13:9 KJV
Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.

James 1:6 KJV
But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.

Romans 16:17-18 KJV
Now I beseech you, brethren, 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.