EXTRA · Side-ring · Parashas Shoftim · Passuk 18:18
A prophet I will raise up for them from among their brethren, like you, and I will put My words in his mouth, and he shall speak to them all that I command him.
Chazal / classical source (beyond TT-numbered main-ring units): Sifrei Devarim 175 / Rambam, Yesodei HaTorah.
Lemma: וְדִבֶּר אֲלֵיהֶם אֵת כׇּל אֲשֶׁר אֲצַוֶּנּוּ.
Sefaria — Sifrei Devarim 175 / Rambam, Yesodei HaTorah
English: ‘And he shall speak to them all that I command him’ – he shall neither diminish nor add.
Derash on the fidelity of transmission (Sifrei / Rambam) — the prophet may not withhold or invent.
The prophet is obligated to speak the entire message that Hashem commands him; he may neither omit nor add of his own.