Ye shall not go in unto them ... - These words are not a quotation from the Pentateuch. They merely give the general meaning of the two passages prohibiting intermarriage with neighboring idolators (marginal references). Strictly speaking, the prohibition in the Law of intermarriage was confined to the Canaanite nations. But the principle of the prohibition applied equally to the Moabites, Ammonites, and Edomites who all bordered on the holy land; and was so applied by Ezra Ezra 9:1 and Nehemiah Nehemiah 13:23.
Related Commentaries of 1 Kings 11:2
1 Kings 11:2
2 Of the nations concerning which the LORD said unto the children of Israel, Ye shall not go in to them, neither shall they come in unto you: for surely they will turn away your heart after their gods: Solomon clave unto these in love.