Ok this movie was filmed between the 90’s and mid 2000’s I believe. It had multiple, modern thieves with modern equipment and guns, and are trying to steal a (holy) object, but by doing so, they are attacked by some sort of demon. They find a way to bypass the demon by cleansing themselves of sin. The commonly quoted line was “_____ acquired”, referencing the idea that they didn’t steal anything, but instead “acquired” things. There might be some possession by the end, as one thief tries to save the other.