Tertullian

Adam had received from God the law of not tasting "of the tree of recognition of good and evil," with the doom of death to ensue upon tasting. However, even (Adam) himself at that time, reverting to the condition of a Psychic after the spiritual ecstasy in which he had prophetically interpreted that "great sacrament" with reference to Christ and the Church, and no longer being "capable of the things which were the Spirit's," yielded more readily to his belly than to God, heeded the meat rather than the mandate, and sold salvation for his gullet! He ate, in short, and perished; saved (as he would) else (have been), if he had preferred to fast from one little tree: so that, even from this early date, animal faith may recognise its own seed, deducing from thence onward its appetite for carnalities and rejection of spiritualities. I hold, therefore, that from the very beginning the murderous gullet was to be punished with the torments and penalties of hunger. Even if God had enjoined no preceptive fasts, still, by pointing out the source whence Adam was slain, He who had demonstrated the offence had left to my intelligence the remedies for the offence. [On Fasting 3]