-According to Digha Nikaya 2: Samaññaphala Sutta: The Fruits of the Contemplative Life,

-Gotama Buddha meditated to remove five hindrances (covetousness, ill will and hatred, dullness and drowsiness, restlessness and worry, doubt).

-After removing those five hindrances, Buddha entered and remained in the first jhana, the second jhana, the third jhana, the fourth jhana.

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to knowledge and vision. He discerned: ‘This body of mine is endowed with form, composed of the four primary elements, born from mother and father, nourished with rice and porridge, subject to inconstancy, rubbing, pressing, dissolution, and dispersion. And this consciousness of mine is supported here and bound up here.’

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to creating a mind-made body.

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to the modes of supranormal powers.

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to the divine ear-element.

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to knowledge of the awareness of other beings.

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to knowledge of the recollection of past lives.

-With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, Buddha directed and inclined it to knowledge of the passing away and re-appearance of beings.

-After those events, Buddha analyzed what he knew and finally had the Four Noble Truths as a final conclusion.