This reminds us of the vision which St. Peter the Apostle

[Mary Naeem]

Pope Shenouda III

This reminds us of the vision which St. Peter the Apostle saw in connection with directing Cornelius. The Apostle saw a great sheet in which were all kinds of food and he heard a voice telling him to kill and eat. But Peter said: " ‘Not so, Lord! For I have never eaten anything common or unclean.’ And a voice spoke to him again the second time, 'What God has cleansed you must not call common' " (Acts 10: 14,15).
It was regarding these foods which were considered impure and unclean, that the Apostle Paul said: "...let no one judge you in food or in drink. " For at the beginning of Christianity, the first people who became Christians were Jews who tried to “Judaize” Christianity, that is, to bring into Christianity all the Jewish customs such as unclean food, purification, keeping the Sabbath, moon festivals, celebrations of the beginning of months and Jewish feasts (such as the Passover, the Unleavened Bread, the Trumpets, the Tents and the Atonement Day), . St. Paul wanted to resist the Judaization of Christianity. That is why he said: "Therefore let no one judge you in food or in drink, or regarding a festival or a new moon or sabbaths, which are a shadow of things to come" (Col.2: 16,17).
Hence this was not an occasion of talking about fasting but it was an occasion of talking about the Jewish customs which the converted Jews wanted to bring into Christianity