Jeremiah stands in Jerusalem's gates and warns: “bear no burden on the sabbath day, nor bring it in by the gates of Jerusalem.” The written Sabbath command says “no work”; this prophetic oracle is the clearest Scripture naming CARRYING as the work in view, and it became the root of the tradition's rule against carrying from one domain to another on the Sabbath, the last of the Mishnah's thirty-nine categories of forbidden labor (Shabbat 7:2). The categories are kept by observant Jews to this day, which is why traditional neighborhoods build an eruv, a boundary that legally merges private domains so families can carry outdoors on the day.

This passage is the live background of John 5:10: “It is the sabbath day: it is not lawful for thee to carry thy bed.” The objectors are standing on Jeremiah's oracle as the tradition had built on it. The healed man's mat, not his healing, is what the rule could name.