Original Verse:
Hebrews Chapter 12 Verse 25See that ye refuse not him that speaketh. For if they escaped not when they refused him that warned [them] on earth, much more [shall not] we [escape] who turn away from him that [warneth] from heaven:

Reference Verses:
Hebrews Chapter 3 Verse 12Take 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 Chapter 2 Verse 2-3 [2] For if the word spoken through angels proved stedfast, and every transgression and disobedience received a just recompense of reward; [3] how shall we escape, if we neglect so great a salvation? which having at the first been spoken through the Lord, was confirmed unto us by them that heard;
Hebrews Chapter 12 Verse 15looking 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;
Hebrews Chapter 2 Verse 3how shall we escape, if we neglect so great a salvation? which having at the first been spoken through the Lord, was confirmed unto us by them that heard;
Deuteronomy Chapter 18 Verse 19And it shall come to pass, that whosoever will not hearken unto my words which he shall speak in my name, I will require it of him.
Hebrews Chapter 8 Verse 5who serve [that which is] a copy and shadow of the heavenly things, even as Moses is warned [of God] when he is about to make the tabernacle: for, See, saith he, that thou make all things according to the pattern that was showed thee in the mount.
Deuteronomy Chapter 4 Verse 36Out of heaven he made thee to hear his voice, that he might instruct thee: and upon earth he made thee to see his great fire; and thou heardest his words out of the midst of the fire.