VI. About captives, who were compelled to eat of sacrificial food.
Concerning those Christians who are asserted to have been polluted with sacrificial food, while among those by whom they were taken prisoners, we have thought it right to make this reply to your enquiry, dear brother, that they be purged by a satisfactory penitence which is to be measured not so much by the duration of the process as by the intensity of the feeling. And whether their compliance was wrung from them by terror or hunger, there need be no hesitation at acquitting them, since the food was taken from fear or want, not from superstitious reverence.
Source: Letters (New Advent)