“By man shall his blood be shed” — from here [derives] the commandment of dinim among the seven Noachide laws: to establish courts of justice.
On the daf / in context: Sanhedrin is identifying the legal commands included among the seven mitzvos of Bnei Noach. The phrase “by man shall his blood be shed” is read as requiring an organized human system of justice—courts capable of enforcing the prohibition against bloodshed and maintaining social order.
Type of Learning
Custom (source for the Noachide mitzvah of dinim).
What Is Learned
The requirement to establish courts is one of the seven mitzvot of Bnei Noach and is rooted in this verse.