Chastity:
Old Testiment:
Jeremiah & Ezekiel:
Do to so many references on this subject, I will just say that much of the book of Jeremiah and Ezekiel contain a large amount of information on this subject. Breaking the law of Chastity was one of the reasons the Jews were scattered. Whoredoms is stated MANY times in these two books, and the scriptures herein give detailed events of why the Lord was angry against Jerusalem and other nations... against Israel to the point of destroying 2/3 of the populace and sending the other 1/3 of the populace into foreign lands.
If you want to know why Israel was scattered, sit down and read Jeremiah and Ezekiel all the way through without stopping. It's a bit of reading, but if you read it all the way through, it will enlighten you on the subject of the Scattering of Israel. It gives in-depth instances and information on this subject (much of which is vile and sick). I will not expound on the negatives of these two books, but read them and you will know. It disturbed me greatly.
The gathering of Israel has already commenced. There is a spiritual gathering, and a literal, physical gathering. It is quite an in-depth subject.
New Testiment:
Book of Mormon:
Doctrine & Covenants:
Pearl of Great Price: