The short answer
Biblical commandments (de'Oraita) come directly from the Torah; rabbinic prohibitions (derabbanan) are enactments of the rabbis, often 'fences' protecting biblical law. In traditional practice both are binding, but biblical law carries greater stringency in many rules.
Why people ask this
This distinction matters constantly in halacha — for example in Sabbath law — and explains why some rules are treated more strictly.
Key terms
- De'Oraita
- Of biblical origin.
- DeRabbanan
- Of rabbinic origin — a protective enactment.
Jewish perspectives
- Traditional: both binding, with biblical law weighted more heavily.
- Reform and some others treat derabbanan as non-binding tradition.
Scholarly & historical context
The rabbis built 'fences around the Torah' to protect biblical law; these became binding in traditional communities.
What is agreed upon
There is a real distinction of source and weight.
Where the disagreement begins
Whether rabbinic prohibitions are binding for everyone.
Practical consequences
Ask whether a given rule is biblical or rabbinic; it affects stringency.
Original sources
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