Concentration
Samādhi Sutta  (AN 10:6)

Then Ven. Ānanda went to the Blessed One and, on arrival, having bowed down to him, sat to one side. As he was sitting there, he said to the Blessed One, “Lord, could a monk have an attainment of concentration such that he would neither be percipient of earth with regard to earth, nor of water with regard to water, nor of fire… wind… the dimension of the infinitude of space… the dimension of the infinitude of consciousness… the dimension of nothingness… the dimension of neither perception nor non-perception… this world… nor of the next world with regard to the next world, and yet he would still be percipient?”

“Yes, Ānanda, he could.…”

“But how, lord, could a monk have an attainment of concentration such that he would neither be percipient of earth with regard to earth…nor of the next world with regard to the next world, and yet he would still be percipient?”

“There is the case, Ānanda, where the monk would be percipient in this way: ‘This is peace, this is exquisite—the resolution of all fabrications; the relinquishment of all acquisitions; the ending of craving; dispassion; cessation; unbinding.’ It’s in this way that a monk could have an attainment of concentration such that he would neither be percipient of earth with regard to earth, nor of water with regard to water, nor of fire… wind… the dimension of the infinitude of space… the dimension of the infinitude of consciousness… the dimension of nothingness… the dimension of neither perception nor non-perception… this world… nor of the next world with regard to the next world, and yet he would still be percipient.”

See also: DN 11; AN 9:36—37; AN 11:10