Deuteronomy 11:16

Take heed to yourselves, lest your heart be deceived, and ye turn aside, and serve other gods, and worship them;

Job 31:27

And my heart hath been secretly enticed, And my mouth hath kissed my hand:

Deuteronomy 8:19

And it shall be, if thou shalt forget Jehovah thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.

Deuteronomy 29:18

lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from Jehovah our God, to go to serve the gods of those nations; lest there should be among you a root that beareth gall and wormwood;

Hebrews 2:1

Therefore we ought to give the more earnest heed to the things that were heard, lest haply we drift away from them .

Hebrews 3:12

Take heed, brethren, lest haply there shall be in any one of you an evil heart of unbelief, in falling away from the living God:

Deuteronomy 4:9

Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes saw, and lest they depart from thy heart all the days of thy life; but make them known unto thy children and thy children's children;

Deuteronomy 4:23

Take heed unto yourselves, lest ye forget the covenant of Jehovah your God, which he made with you, and make you a graven image in the form of anything which Jehovah thy God hath forbidden thee.

Deuteronomy 13:3

thou shalt not hearken unto the words of that prophet, or unto that dreamer of dreams: for Jehovah your God proveth you, to know whether ye love Jehovah your God with all your heart and with all your soul.

Deuteronomy 30:17

But if thy heart turn away, and thou wilt not hear, but shalt be drawn away, and worship other gods, and serve them;

Isaiah 44:20

He feedeth on ashes; a deceived heart hath turned him aside; and he cannot deliver his soul, nor say, Is there not a lie in my right hand?

Luke 21:8

And he said, Take heed that ye be not led astray: for many shall come in my name, saying, I am he ; and, The time is at hand: go ye not after them.

Luke 21:34

But take heed to yourselves, lest haply your hearts be overcharged with surfeiting, and drunkenness, and cares of this life, and that day come on you suddenly as a snare:

Luke 21:36

But watch ye at every season, making supplication, that ye may prevail to escape all these things that shall come to pass, and to stand before the Son of man.

Hebrews 4:1

Let us fear therefore, lest haply, a promise being left of entering into his rest, any one of you should seem to have come short of it.

Hebrews 12:15

looking carefully lest there be any man that falleth short of the grace of God; lest any root of bitterness springing up trouble you , and thereby the many be defiled;

James 1:26

If any man thinketh himself to be religious, while he bridleth not his tongue but deceiveth his heart, this man's religion is vain.

1 John 5:21

My little children, guard yourselves from idols.

Revelation 12:9

And the great dragon was cast down, the old serpent, he that is called the Devil and Satan, the deceiver of the whole world; he was cast down to the earth, and his angels were cast down with him.

Revelation 13:14

And he deceiveth them that dwell on the earth by reason of the signs which it was given him to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast who hath the stroke of the sword and lived.

Revelation 20:4

And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that had been beheaded for the testimony of Jesus, and for the word of God, and such as worshipped not the beast, neither his image, and received not the mark upon their forehead and upon their hand; and they lived, and reigned with Christ a thousand years.

Treasury of Scripture Knowledge

Summary

Take heed to yourselves, that your heart be not deceived, and ye turn aside, and serve other gods, and worship them;

Bible References

Take heed

Deuteronomy 4:9
Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes saw, and lest they depart from thy heart all the days of thy life; but make them known unto thy children and thy children's children;
Luke 21:8
And he said, Take heed that ye be not led astray: for many shall come in my name, saying, I am he ; and, The time is at hand: go ye not after them.
Hebrews 2:1
Therefore we ought to give the more earnest heed to the things that were heard, lest haply we drift away from them .
Hebrews 3:12
Take heed, brethren, lest haply there shall be in any one of you an evil heart of unbelief, in falling away from the living God:
Hebrews 4:1
Let us fear therefore, lest haply, a promise being left of entering into his rest, any one of you should seem to have come short of it.
Hebrews 12:15
looking carefully lest there be any man that falleth short of the grace of God; lest any root of bitterness springing up trouble you , and thereby the many be defiled;

Your heart

Deuteronomy 13:3
thou shalt not hearken unto the words of that prophet, or unto that dreamer of dreams: for Jehovah your God proveth you, to know whether ye love Jehovah your God with all your heart and with all your soul.
Deuteronomy 29:18
lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from Jehovah our God, to go to serve the gods of those nations; lest there should be among you a root that beareth gall and wormwood;
Job 31:27
And my heart hath been secretly enticed, And my mouth hath kissed my hand:
Isaiah 44:20
He feedeth on ashes; a deceived heart hath turned him aside; and he cannot deliver his soul, nor say, Is there not a lie in my right hand?
James 1:26
If any man thinketh himself to be religious, while he bridleth not his tongue but deceiveth his heart, this man's religion is vain.
1 John 5:21
My little children, guard yourselves from idols.
Revelation 12:9
And the great dragon was cast down, the old serpent, he that is called the Devil and Satan, the deceiver of the whole world; he was cast down to the earth, and his angels were cast down with him.
Revelation 13:14
And he deceiveth them that dwell on the earth by reason of the signs which it was given him to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast who hath the stroke of the sword and lived.
Revelation 20:4
And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that had been beheaded for the testimony of Jesus, and for the word of God, and such as worshipped not the beast, neither his image, and received not the mark upon their forehead and upon their hand; and they lived, and reigned with Christ a thousand years.

And serve

Deuteronomy 8:19
And it shall be, if thou shalt forget Jehovah thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.
Deuteronomy 30:17
But if thy heart turn away, and thou wilt not hear, but shalt be drawn away, and worship other gods, and serve them;

American Standard Version Public Domain