In Mari, Dagan and Addu (Hadad) were protectors of the king and played a role in enthronement ceremony. Multiple kings of Mari regarded Dagan as the source of their authority. During the rein of Zimri-Lim, Dagan was one of the gods who received the most offerings during festivals, with other deities comparably celebrated in official offering lists including the local dynasty's tutelary deity Itūr-Mēr, Annunitum, Nergal, Shamash, Ea, Ninhursag, Addu (Hadad) and Belet Ekalli (Ninegal). In a letter Zimri-Lim's wife Šibtu enumerated Dagan, Shamash, Itūr-Mēr, Belet Ekalli and Addu as "the allies for me" and the deities who "go by my lord's side." The Terqa temple was closely associated with Zimri-Lim. A source from the period of his reign attests that to celebrate his coronation, a weapon was sent from Hadad's temple in Aleppo to Dagan's in Terqa, likely to legitimize his rule. It is possible that this ritual object represented the mace wielded by the weather god in his battle with the sea (analogous to the battle between Baal and Yam in the Ugaritic Baal cycle. Despite the close connection between the clergy of Dagan from Terqa and Zimri-Lim, he was viewed unfavorably by the population of Tuttul and the presence of his officials was in at least one case regarded as a disturbance of Dagan's rites.
