And now I beseech thee, lady, not as though I wrote a new commandment unto thee, but that which we had from the beginning, that we love one another.(2 John 1:5)

And this is love, that we walk after his commandments. This is the commandment, That, as ye have heard from the beginning, ye should walk in it.(2 John 1:6)

For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.(2 John 1:7)

Look to yourselves, that we lose not those things which we have wrought, but that we receive a full reward.

Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.(2 John 1:9)

If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed:(2 John 1:10)

For he that biddeth him God speed is partaker of his evil deeds.(2 John 1:11)

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2 John 1:8 - Cross Reference

But call to remembrance the former days, in which, after ye were illuminated, ye endured a great fight of afflictions; (Hebrews 10:32)

But take ye heed: behold, I have foretold you all things. (Mark 13:23)

I am afraid of you, lest I have bestowed upon you labour in vain. (Galatians 4:11)

For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect. (Matthew 24:24)

But take heed to yourselves: for they shall deliver you up to councils; and in the synagogues ye shall be beaten: and ye shall be brought before rulers and kings for my sake, for a testimony against them. (Mark 13:9)

Now he that planteth and he that watereth are one: and every man shall receive his own reward according to his own labour. (1 Corinthians 3:8)

And Jesus answering them began to say, Take heed lest any man deceive you: (Mark 13:5)

If any man's work abide which he hath built thereupon, he shall receive a reward. (1 Corinthians 3:14)

Cast not away therefore your confidence, which hath great recompence of reward. (Hebrews 10:35)

That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world; (Philippians 2:15)

Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled; (Hebrews 12:15)

And Jesus answered and said unto them, Take heed that no man deceive you. (Matthew 24:4)

Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing. (Philippians 3:16)

And they that be wise shall shine as the brightness of the firmament; and they that turn many to righteousness as the stars for ever and ever. (Daniel 12:3)

And last of all he was seen of me also, as of one born out of due time. (1 Corinthians 15:8)

And he that reapeth receiveth wages, and gathereth fruit unto life eternal: that both he that soweth and he that reapeth may rejoice together. (John 4:36)

And he said, Take heed that ye be not deceived: for many shall come in my name, saying, I am Christ; and the time draweth near: go ye not therefore after them. (Luke 21:8)

Have ye suffered so many things in vain? if it be yet in vain. (Galatians 3:4)

Behold, I come quickly: hold that fast which thou hast, that no man take thy crown. (Revelation 3:11)