Among the Jewish community, there was a prevalent belief that along with the written law, God had bestowed upon Moses an unwritten law that was transmitted orally—from Moses to Joshua, and then to the judges and prophets. This oral tradition, consisting of the rabbinical interpretations and teachings from various ages, commanded the unwavering reverence of the populace. Under the guidance of the scribes and Pharisees, the people often traded the spirit of the true law for mere adherence to its letter, yielding to human customs instead. The exceedingly trivial, at times seemingly nonsensical, stipulations of this oral law were known as 'traditions of the elders,' and these were observed with far greater zeal and precision than the moral imperatives of the God-given law articulated in the Pentateuch. Consequently, the daily life of the Jewish people became entangled in these distortions of Divine truth, as false interpreters of revelation imposed heavy burdens upon the shoulders of the people (Matt. 23:4).
On this occasion, the Pharisees and scribes confronted the disciples of Jesus for not adhering to the prescribed washings as dictated by tradition. The law of Moses (Lev. 11) outlined detailed classifications of clean and unclean animals, specifying that even the mere touch of unclean substances rendered an individual unclean until evening. Additionally, if anything unclean fell upon a wooden vessel or garment, it was mandated to wash these items in water, and earthen vessels were to be destroyed (vv. 24-25, 32-33). By establishing stringent boundaries around the law and rigorously expanding its stipulations, the Jewish legalists insisted on the necessity of washing hands before meals as a preventive measure against unintentionally transferring uncleanness to food. They justified this extensive interpretation through the 'tradition of the elders,' supplementing it with numerous trivial regulations that later became codified in the Talmud.
The obligation of these practices at the time of Jesus is evident in the words of the Evangelist Mark: "The Pharisees and all the Jews do not eat unless they thoroughly wash their hands, holding to the tradition of the elders; and when they come from the marketplace, they do not eat unless they wash, and there are many other customs they observe" (Mark 7:3-4). When some of the disciples of Jesus were seen eating bread without washing their hands, the Pharisees and scribes first reproached them and then turned to the Teacher with the inquiry: "Why do Your disciples not walk according to the tradition of the elders, but eat bread with unwashed hands?" According to St. John Chrysostom, the actions of the disciples were unintentional; they disregarded what was excessive and focused instead on fulfilling what was truly essential.