The trimūrti, “three forms”, presents creation, preservation and dissolution as three aspects of one divine reality, personified as Brahmā, Viṣṇu and Śiva. The idea appears in the Purāṇas, though each sectarian tradition regards its own god as supreme over the others.
Trimūrti
The triad of Brahmā the creator, Viṣṇu the preserver and Śiva the destroyer.
Also: Trimurti