Trita ("the Third") is a minor deity of the Rigveda, mentioned 41 times. He is associated with the Maruts, with Vayu and with Indra, like Indra, or as Indra's assistant, fighting Tvastar, Vrtra and Vala. He is called Āptya, the deity of the Apas (waters).
In RV 1.105, Trita fallen into a well begs aid from the gods. Sayana on 1.105 comments that this relates to three rishis, Ekata, Dvita and Trita who found a well, and Trita, drawing water, was pushed down by the other two and imprisoned, where he composed a hymn to the gods, and managed miraculously to prepare the sacrificial Soma; this is alluded to in RV 9.34.4 and described in Mahabharata 9.2095.