"For whoever does work upon it, that soul shall be but off" — a complete work. If one wrote one letter (on the Sabbath) in the morning, and another towards evening; or if he wove one strand in the morning and another towards evening, I might think that he is liable. It is, therefore, written "And you shall keep the Sabbath, for it is holy to you. Those who profane it shall be put to death. For whoever does work upon it, that soul shall be cut off" — a complete work.