Shulchan Arukh, Orach Chayim 683/שולחן ערוך·אורח חיים תרפ״ג

1All eight days of Hanukkah, the Hallel is read. Rema: And all eight days of Hanukkah, Tachanun [the supplication prayer], Tzidkatcha [the abridged supplication prayer said on the Sabbath], Lamenatzei'ach, and Tziduk hadin [the funeral prayer] are not said: [Mahril and Minahgim].