“ Remember the sabbath day, to keep it holy. Six days thou shalt do thy work, and on the seventh day thou shalt rest: that thine ox and thine ass may rest, and the son of thy handmaid, and the stranger, may be refreshed. Speak thou also unto the children of Israel, saying, Verily my sabbaths ye shall keep: for it is a sign between me and you throughout your generations; that ye may know that I am the LORD that doth sanctify you. Moreover also I gave them my sabbaths, to be a sign between me and them, that they might know that I am the LORD that sanctify them. ”