Exodus 31:13-14
Read Exodus 31 in full →13“But as for you, speak to the sons of Israel, saying, ‘aYou shall surely keep My sabbaths; for this is ba sign between Me and you throughout your generations, that you may know that I am Yahweh who makes you holy. 14‘Therefore you shall keep the sabbath, for it is holy to you. aEveryone who profanes it shall surely be put to death; for whoever does any work on it, that person shall be cut off from among his people.