R. Yonathan says: What is the intent of "You shall not light a fire"? From "And Moses assembled, etc.", I might think that one is not liable until he transgresses all thirty-nine proto-labors. It is, therefore, written (Exodus 34:21) "From plowing and from harvesting shall you rest." (I would think that he is not liable) until he transgresses two, and if not, he is not liable. It is, therefore, written "You shall not light a fire."