King Bimbisara ascended the Magadha throne at fifteen within the Haryanka dynasty, reigning approximately 52 years. He fortified and developed his capital, Rajagriha, transforming it into a significant center for early Buddhist activities.

He cultivated a significant relationship with Siddhartha Gautama, first encountering the future Buddha as a young ascetic in Rajagriha. After Siddhartha attained enlightenment, Bimbisara became a devoted lay disciple, achieving sotapannahood upon hearing the Buddha's teachings. His patronage included donating the Veluvana monastery to the Buddha and Sangha, facilitating rainy-season residence and fulfilling five specific wishes for spreading Buddhist teachings in his realm.

Administratively, Bimbisara significantly expanded Magadha's territory through conquests like Anga, which gained access to vital trade routes. He secured strategic marriage alliances with Princess Kosala Devi of Kosala (bringing Kashi as dowry), Princess Chellana of Vaishali, and Kshema of the Madra clan. His court featured notable figures including physician Jivaka and treasurer Kumbhaghosaka.

A prophecy foretold Bimbisara would be killed by his son, fueling lifelong dread. This manifested when Prince Ajatasattu, influenced by monk Devadatta, imprisoned him to seize power. Initially sustained by his wife's covert aid during confinement, Bimbisara endured torture after stricter measures were enforced, meeting death through meditation on impermanence. His demise spurred Ajatasattu's remorse and continued Buddhist patronage.

Bimbisara balanced reverence for Buddhism and Jainism, with Jain texts naming him Shrenika and depicting him as a future Tirthankara. His personality demonstrated commitment to duty, justice, and ethical governance, driven by structured decision-making and political pragmatism.