>“No mongrel shall enter the congregation of Yahweh, not even in the tenth generation."
(Deut. 23:2)
>They have dealt faithlessly with Yahweh; for they have borne alien children. Now the new moon shall devour them with their fields.
(Hosea 5:7)
>For they have taken of their daughters for themselves, and for their sons: so that the holy seed have mingled themselves with the people of those lands: yea, the hand of the princes and rulers hath been chief in this trespass.
(Ezra 9:2)
>'My child, avoid all loose conduct. Choose a wife of your father's stock. Do not take a foreign wife outside your father's tribe, because we are the children of the prophets. Remember Noah, Abraham, Isaac and Jacob, our ancestors from the beginning. All of them took wives from their own kindred, and they were blessed in their children, and their race will inherit the earth.
(Tobit 4:12)
If you do in any way go back and cleave unto the remnants of these nations, even these that remain among you, and shall make marriages with them, an go in unto them an they unto you. Know for a certainty that there shall be snares and traps unto you, and scourges in your side and thrones in your eyes. Until ye perish off from this good land which Lord your God has given you.
(Joshua 23:12-13)
IF YOU DISOBAY THE LORD
>The Lord will cause you to be defeated before your enemies. You will come at them from one direction but flee from them in seven, and you will become a thing of horror to all the kingdoms on earth. 26 Your carcasses will be food for all the birds and the wild animals, and there will be no one to frighten them away. 27 The Lord will afflict you with the boils of Egypt and with tumors, festering sores and the itch, from which you cannot be cured. 28 The Lord will afflict you with madness, blindness and confusion of mind. 29 At midday you will grope about like a blind person in the dark. You will be unsuccessful in everything you do; day after day you will be oppressed and robbed, with no one to rescue you.
>You will be pledged to be married to a woman, but another will take her and rape her. You will build a house, but you will not live in it. You will plant a vineyard, but you will not even begin to enjoy its fruit. 31 Your ox will be slaughtered before your eyes, but you will eat none of it. Your donkey will be forcibly taken from you and will not be returned. Your sheep will be given to your enemies, and no one will rescue them. 32 Your sons and daughters will be given to another nation, and you will wear out your eyes watching for them day after day, powerless to lift a hand. 33 A people that you do not know will eat what your land and labor produce, and you will have nothing but cruel oppression all your days. 34 The sights you see will drive you mad. 35 The Lord will afflict your knees and legs with painful boils that cannot be cured, spreading from the soles of your feet to the top of your head.
(Deuteronomy 28.)