An Exegetical Note Concerning Article 26:

It seems to me that while passages commending fasting by example and by way of advice explicitly refer to the practice, those used in the CA to speak against its practice in the life of the church focus on the Jewish Christians’ adherence to dietary laws and the problem that arises in a mixed (i.e., Jewish/Gentile) community. Fasting and dietary law both existed in the early Jewish-Christian world of the Apostles, but Scripture focuses on the divisive and legalistic problems that arise from the latter while couching the former in positive terms.