Abhidhamma Pitaka is the Buddhist text that deals with philosophical matters.

Explanation:

The Buddhist canon is divided into three major sections known as the Tripitaka or the "Three Baskets." These three sections are the Vinaya Pitaka, Sutta Pitaka, and Abhidhamma Pitaka. Each Pitaka deals with different aspects of Buddhist teachings and practices.

1. Vinaya Pitaka: This section contains the rules and regulations for monastic discipline. It focuses on the ethical and disciplinary aspects of the Buddhist monastic community.

2. Sutta Pitaka: The Sutta Pitaka is a collection of discourses attributed to the Buddha. It contains a wide range of teachings, including ethical guidelines, meditation instructions, and philosophical discussions. The Suttas are considered the most important part of the Buddhist canon and are often studied for their practical guidance.

3. Abhidhamma Pitaka: The Abhidhamma Pitaka is the most philosophical and analytical section of the Buddhist canon. It delves into the deeper understanding of the nature of reality and the mind. It provides detailed classifications, analysis, and explanations of various mental and physical phenomena. The Abhidhamma Pitaka aims to provide a systematic and comprehensive understanding of the Buddha's teachings.

The Abhidhamma Pitaka is considered to be a highly complex and challenging text that requires deep contemplation and study. It explores topics such as consciousness, mental factors, the nature of reality, and the interplay of different phenomena. It provides a detailed map of the mind and its functions, offering insights into the workings of human experience.

In conclusion, while all three sections of the Buddhist canon contain valuable teachings, the Abhidhamma Pitaka specifically deals with philosophical matters, providing a profound and systematic analysis of the nature of reality and the mind.