Inconceivable
Acintita Sutta  (AN 4:77)

“There are these four inconceivables that are not to be conjectured about, that would bring madness & vexation to anyone who conjectured about them. Which four?

“The Buddha-range of the Buddhas [i.e., the range of powers a Buddha develops as a result of becoming a Buddha] is an inconceivable that is not to be conjectured about, that would bring madness & vexation to anyone who conjectured about it.

“The jhāna-range of a person in jhāna [i.e, the range of powers that one may obtain while absorbed in jhāna].…

“The [precise working out of the] results of kamma.…

“Conjecture about [the origin, etc., of] the world is an inconceivable that is not to be conjectured about, that would bring madness & vexation to anyone who conjectured about it.

“These are the four inconceivables that are not to be conjectured about, that would bring madness & vexation to anyone who conjectured about them.”

See also: MN 63; MN 136