Analysis of information sources in references of the Wikipedia article "Ashoka" in English language version.
Aśoka placed Buddhism side by side with Brahmanism, Jainism, and the Ajivikas in his edicts and stressed that his dhamma was not the doctrine of one religion but was universal.
The Bhatru inscription confirms Emperor Ashoka's acceptance of Buddhism, and in it Ashoka describes himself as the emperor of Magadha.