Nicene and Post-Nicene Fathers, Vol. III:
Moral Treatises of St. Augustin: Section 2

2. Setting aside, therefore, jokes, which have never been accounted lies, seeing they bear with them in the tone of voice, and in the very mood of the joker a most evident indication that he means no deceit, although the thing he utters be not true: touching which kind of discourse, whether it be meet to be used by perfect minds, is another question which we have not at this time taken in hand to clear; but setting jokes apart, the first point to be attended to, is, that a person should not be thought to lie, who lieth not.