What do the 39 laws forbid you do on the sabbath?

Answer 1

The 39 melachot are ploughing earth, sowing, reaping, binding sheaves, threshing, winnowing, selecting, grinding, sifting, kneading, baking, shearing wool, washing wool, beating wool, dyeing wool, spinning, weaving, making two loops, weaving two threads, separating two threads, tying, untying, sewing stitches, tearing, trapping, slaughtering, flaying, tanning, scraping hide, marking hides, cutting hide to shape, writing two or more letters, erasing two or more letters, building, demolishing, extinguishing a fire, kindling a fire, putting the finishing touch on an object and transporting an object between the private domain and the public domain, or for a distance of 4 cubits within the public domain.

These will all have off shoots to clarify things. For example the law to not kindle a fire is expanded to no creation of a spark to ban you from using electricity.

Answer 2

The 39 laws, known as the 39 Melachot, are a set of activities forbidden on the Sabbath in Jewish law. These include actions like lighting a fire, grinding grains, and building structures. The purpose is to refrain from creative work and focus on rest and spiritual activities on this day of rest.