Deuteronomy 22:9
Commentary on this verse
By Alexander Payne
Verse 9. You shall not commingle with the holy truths of the Church which you have received and accepted, the ideas derived from different and diverse religions; lest what is derived from these ideas become mingled with the good derived from the holy truths of the Church so that they cannot be separated, and thus both become denied (Matthew 9:16-17).