Therefore it shall be a sign unto thee upon thine hand and a remembrance between thine eyes, that the LORD's law may be in thy mouth. For with a strong hand the LORD brought thee out of Egypt;

"Speak unto the children of Israel and say, 'In any wise see that ye keep my Sabbath, for it shall be a sign between me and you in your generations for to know, that I the LORD do sanctify you.

For it shall be a sign between me, and the children of Israel for ever. For in six days the LORD made heaven and earth, and the seventh day he rested and was refreshed.'"