30- One may not swear a false or a wasted oath.
31- Sanctify the day of Shabos with words. Also mention Shabos every day. It reminds us that Hashem created the entire world in 6 days.
32- One may not do any of 39 forms of work on Shabos. To remember that we need Hashem's help for everything we do.
Now may be a good time for a gem of Torah study.
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