Original Verse:
Deuteronomy Chapter 8 Verse 19And it shall be, if thou do at all forget the LORD thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.

Reference Verses:
Deuteronomy Chapter 6 Verse 14Ye shall not go after other gods, of the gods of the people which are round about you;
Deuteronomy Chapter 11 Verse 16Take heed to yourselves, that your heart be not deceived, and ye turn aside, and serve other gods, and worship them;
Deuteronomy Chapter 11 Verse 28And a curse, if ye will not obey the commandments of the LORD your God, but turn aside out of the way which I command you this day, to go after other gods, which ye have not known.
Deuteronomy Chapter 30 Verse 18I denounce unto you this day, that ye shall surely perish, and that ye shall not prolong your days upon the land, whither thou passest over Jordan to go to possess it.
Jeremiah Chapter 7 Verse 6If ye oppress not the stranger, the fatherless, and the widow, and shed not innocent blood in this place, neither walk after other gods to your hurt:
Deuteronomy Chapter 4 Verse 26I call heaven and earth to witness against you this day, that ye shall soon utterly perish from off the land whereunto ye go over Jordan to possess it; ye shall not prolong your days upon it, but shall utterly be destroyed.
Numbers Chapter 15 Verse 39And it shall be unto you for a fringe, that ye may look upon it, and remember all the commandments of the LORD, and do them; and that ye seek not after your own heart and your own eyes, after which ye use to go a whoring:
Deuteronomy Chapter 29 Verse 25-28 [25] Then men shall say, Because they have forsaken the covenant of the LORD God of their fathers, which he made with them when he brought them forth out of the land of Egypt: [26] For they went and served other gods, and worshipped them, gods whom they knew not, and whom he had not given unto them: [27] And the anger of the LORD was kindled against this land, to bring upon it all the curses that are written in this book: [28] And the LORD rooted them out of their land in anger, and in wrath, and in great indignation, and cast them into another land, as it is this day.
Joshua Chapter 23 Verse 13Know for a certainty that the LORD your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the LORD your God hath given you.
Deuteronomy Chapter 30 Verse 19I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live:
Zephaniah Chapter 1 Verse 18Neither their silver nor their gold shall be able to deliver them in the day of the LORD's wrath; but the whole land shall be devoured by the fire of his jealousy: for he shall make even a speedy riddance of all them that dwell in the land.
Zephaniah Chapter 3 Verse 6I have cut off the nations: their towers are desolate; I made their streets waste, that none passeth by: their cities are destroyed, so that there is no man, that there is none inhabitant.
Daniel Chapter 9 Verse 2In the first year of his reign I Daniel understood by books the number of the years, whereof the word of the LORD came to Jeremiah the prophet, that he would accomplish seventy years in the desolations of Jerusalem.
1st Samuel Chapter 12 Verse 25But if ye shall still do wickedly, ye shall be consumed, both ye and your king.
Luke Chapter 13 Verse 3I tell you, Nay: but, except ye repent, ye shall all likewise perish.
Luke Chapter 13 Verse 5I tell you, Nay: but, except ye repent, ye shall all likewise perish.
Amos Chapter 3 Verse 2You only have I known of all the families of the earth: therefore I will punish you for all your iniquities.
Luke Chapter 12 Verse 47And that servant, which knew his lord's will, and prepared not himself, neither did according to his will, shall be beaten with many stripes.
Luke Chapter 12 Verse 48But he that knew not, and did commit things worthy of stripes, shall be beaten with few stripes. For unto whomsoever much is given, of him shall be much required: and to whom men have committed much, of him they will ask the more.
Deuteronomy Chapter 31 Verse 20For when I shall have brought them into the land which I sware unto their fathers, that floweth with milk and honey; and they shall have eaten and filled themselves, and waxen fat; then will they turn unto other gods, and serve them, and provoke me, and break my covenant.
Deuteronomy Chapter 4 Verse 9Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes have seen, and lest they depart from thy heart all the days of thy life: but teach them thy sons, and thy sons' sons;