In Dvaita Vedanta, there are several key texts and scriptures that are considered authoritative and essential for understanding the philosophy of dualism. These texts not only provide a comprehensive understanding of the relationship between Atman and Brahman, but also offer guidance for spiritual practice and moral conduct.

One of the most important texts in Dvaita Vedanta is the Brahma Sutras, also known as the Vedanta Sutras. This text, composed by Sage Vyasa, is a collection of aphorisms that systematically explain the teachings of the Upanishads and the Bhagavad Gita. It is considered the foundational text of Vedanta and is revered by all schools of Vedanta, including Dvaita.

Another significant text in Dvaita Vedanta is the Bhagavad Gita, which is a dialogue between Lord Krishna and Arjuna on the battlefield of Kurukshetra. This text is highly revered in Hinduism and is considered a practical guide for spiritual seekers. In Dvaita Vedanta, the Bhagavad Gita is interpreted in a dualistic framework, highlighting the distinction between the individual soul (Atman) and the Supreme Soul (Brahman).

The principal text of Dvaita Vedanta is the Brahma Samhita, composed by Madhvacharya, the founder of the Dvaita school. This text expounds on the nature of Brahman, the relationship between Brahman and the individual soul, and the path to liberation. It also includes hymns in praise of Lord Vishnu, the supreme deity in Dvaita Vedanta.

The Harivamsa Purana and the Mahabharata are also considered important texts in Dvaita Vedanta. These epics contain the teachings of Lord Krishna and the stories of his incarnations, which are central to the philosophy of Dvaita.

Apart from these primary texts, there are also commentaries and works by other Dvaita scholars that are highly regarded in the tradition. These include the works of Jayatirtha, Vyasatirtha, and Raghavendra Swami.

In addition to these texts, Dvaita Vedanta also draws upon the teachings of the six orthodox schools of Hindu philosophy, including Nyaya, Vaisheshika, Samkhya, Yoga, Mimamsa, and Vedanta. The Dvaita school has also produced several independent works on logic, grammar, and ritualistic practices, which are considered essential for understanding the philosophical concepts in a systematic manner.

In conclusion, the key texts and scriptures in Dvaita Vedanta provide a comprehensive understanding of the dualistic philosophy and serve as a guide for spiritual seekers. These texts are highly revered and continue to be studied and interpreted by scholars and practitioners of Dvaita Vedanta to this day.