Leviticus 18:30
So you are to keep your commitment to Me not to practice any of the abominable customs which have been practiced before you, so that you do not defile yourselves with them; I am the Lord your God.

Romans 12:2
And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect.