…Divisive speech, when cultivated, developed, and practiced, leads to hell, the animal realm, or the ghost realm. The minimum result it leads to for a human being is being divided against friends.…
Note: Except for divisive speech that leads to a schism in the monastic Saṅgha, rebirth in hell is not an automatic result of divisive speech. Karma and results are very complicated, so the meaning to be taken from this suttas is that there are a range of results that can come from bad actions.
Read the entire translation of Aṅguttara Nikāya 8.40 Duccaritavipākasutta: The Results of Misconduct by Bhikkhu Sujato on SuttaCentral.net.