The 274th prohibition is that a judge is forbidden from taking a bribe from a litigant, even to give an honest judgment.
The source of this prohibition is G‑d's statement,1 "Do not accept bribery." This prohibition is repeated.2
The Sifri3 says, "The prohibition, 'Do not accept bribery,' applies even to declare that innocent people are innocent and that guilty people are guilty."
The details of this mitzvah are explained in a number of passages in tractate Sanhedrin.
