Deuteronomy 12:23

23.Only be (21) sure that thou eat not. It is not without cause that he earnestly exhorts them to inflexible firmness, because it was both a matter trifling in appearance, and its observation troublesome, whilst it was easy to decline from it on account of the universal example of the Gentiles. For if they considered within themselves that it contributed not to holiness that they should not touch blood, hence a snare to indulgence might easily have arisen.