On one occasion some early grapes were sent to Abba Macarius because he longed for them, and to give a proof of his abstinence, he sent them to another brother who was sick, and who craved for grapes; and having received them, he rejoiced over them greatly, and then he despised his desire, and sent them on to another brother, as one who had no wish for food of any kind, and who held his self-denial in contempt. Now when the brother had received the grapes, although he desired greatly to eat them, he did the same as the other brother had done, and no man wished to eat them. And after they had gone about among many brethren, the last one who received them sent them to the blessed Macarius as a gift of great honour; and when the blessed Macarius saw the grapes he marvelled at the extent of the self-denial of the brethren, and gave thanks unto God, and he did not eat them.

[Apophthegmata Patrum]