Rāhula was the only son of Siddhārtha Gautama, and his wife, princess Yaśodharā. He is mentioned in numerous Buddhist texts, from the early period onward. Accounts about Rāhula indicate a mutual impact between Prince Siddhārtha's life and the lives of his family members. According to the Pāli tradition, Rāhula was born on the day of Prince Siddhārtha's renunciation, and was therefore named Rāhula, meaning a fetter on the path to enlightenment. According to the Mūlasarvāstivāda tradition, and numerous other later sources, however, Rāhula was only conceived on the day of Prince Siddhartha's renunciation, and was born six years later, when Prince Siddhārtha became enlightened as the Buddha. This long gestation period was explained by bad karma from previous lives of both Yaśodharā and of Rāhula himself, although more naturalistic reasons are also given. As a result of the late birth, Yaśodharā needed to prove that Rāhula was really Prince Siddhārtha's son, which she eventually did successfully by an act of truth. Historian H.W. Schumann has argued that Prince Siddhārtha conceived Rāhula and waited for his birth, to be able to leave the palace with the king and queen's permission, but Orientalist Noël Péri considered it more likely that Rāhula was born after Prince Siddhārtha left his palace.

Siddhartha Gautama, most commonly referred to as the Buddha, was a wandering ascetic and religious teacher who lived in South Asia during the 6th or 5th century BCE and founded Buddhism. According to Buddhist legends, he was born in Lumbini, in what is now Nepal, to royal parents of the Shakya clan, but renounced his home life to live as a wandering ascetic. Buddhists believe that after leading a life of mendicancy, asceticism, and meditation, he attained nirvana at Bodh Gaya in what is now India. The Buddha then wandered through the lower Indo-Gangetic Plain, teaching and building a monastic order. Buddhist tradition holds he died in Kushinagar and reached parinirvana, final nirvana.