Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth.
We should also strive to be completely faithful to our husband or wife in mind and body.
God designed human reproduction through sex as a means to populate the earth.
The seventh commandment forbids adultery.
It's in the BibleLeviticus
In this passage, it is clear that the Bible uses fornication to refer to sexual activity before marriage.
God is more than willing to forgive you of all lust and free you from all impurity through the cleansing blood of his Son, Jesus.
Though they know God's decree that those who practice such things deserve to die, they not only do them but give approval to those who practice them.
Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh.