Explanation:

The list of the sixteen Mahajanapadas is mentioned in several ancient texts:

Anguttara Nikaya: It is a Buddhist text, one of the divisions of the Sutta Pitaka of the Pali Canon (Tipitaka) in Theravada Buddhism. The Anguttara Nikaya provides a list of the sixteen Mahajanapadas.

Mahavastu: The Mahavastu (meaning "Great Story") is a Buddhist text of the Lokottaravada school, another text that mentions the list of the sixteen Mahajanapadas.

Bhagavati Sutra: It is a Jain text, which also mentions the Mahajanapadas. It's one of the most important canonical scriptures of Jainism.

Hence, all three sources mentioned - Anguttara Nikaya, Mahavastu, and Bhagavati Sutra - provide the list of the sixteen Mahajanapadas.