Departure and Ascetic Life OF BUDDHA

The Great Departure. Gandhara, 2nd century CE.
At the age of 29, Siddhartha left his palace in order to meet his subjects. Despite his father's effort to remove the sick, aged and suffering from the public view, Siddhartha was said to have seen an old man. Disturbed by this, when told that all people would eventually grow old by his charioteer Channa, the prince went on further trips where he encountered, variously, a diseased man, a decaying corpse, and an ascetic. Deeply depressed by these sights, he sought to overcome old age, illness, and death by living the life of an ascetic.
Siddhartha escaped his palace, accompanied by Channa aboard his horse Kanthaka, leaving behind this royal life to become a mendicant. It is said that, "the horse's hooves were muffled by the gods" to prevent guards from knowing the Bodhisatta's departure. This event is traditionally called "The Great Departure".
Siddhartha initially went to Rajagaha and began his ascetic life by begging for alms in the street. Having been recognised by the men of King Bimbisara, Bimbisara offered him the throne after hearing of Siddhartha's quest. Siddhartha rejected the offer, but promised to visit his kingdom of Magadha first, upon attaining enlightenment.
Siddhartha left Rajagaha and practised under two hermit teachers. After mastering the teachings of Alara Kalama (Skr. Ārāḍa Kālāma), Siddhartha was asked by Kalama to succeed him, but moved on after being unsatisfied with his practices. He then became a student of Udaka Ramaputta (Skr. Udraka Rāmaputra), but although he achieved high levels of meditative consciousness and was asked to succeed Ramaputta, he was still not satisfied with his path, and moved on.

Siddhartha and a group of five companions led by Kondanna then set out to take their austerities even further. They tried to find enlightenment through near total deprivation of worldly goods, including food, practising self-mortification. After nearly starving himself to death by restricting his food intake to around a leaf or nut per day, he collapsed in a river while bathing and almost drowned. Siddhartha began to reconsider his path. Then, he remembered a moment in childhood in which he had been watching his father start the season's plowing, and he had fallen into a naturally concentrated and focused state that was blissful and refreshing, the jhana.