The 175th mitzvah is that we are commanded to follow majority rule when the Sages disagree about a particular law of the Torah. The same applies to a particular case: if, for example, the judges of the city disagree regarding a case between Reuven and Shimon as to which one owes money, they must follow majority rule.
The source of this mitzvah is G‑d's statement1 (exalted be He), "A case must be decided based on majority rule."
Our Sages said explicitly,2 "Majority rule is mid'oraisa.3
The details of this mitzvah are explained in many passages of tractate Sanhedrin.
