These five faculties are extremely strong in him: the faculties of faith … and wisdom. Because of the strength of these five faculties, in this very life he attains Nibbana without volitional exertion. This is how a person, in this very life, attains Nibbana without volitional exertion. – Anguttara Nikāya

“And how, monks, does a person, in this very life, attain Nibbāna without volitional exertion? Here, secluded from sensual pleasures, secluded from unwholesome states, a monk enters and dwells in the first jhāna the fourth jhāna. He dwells relying upon these five powers of a trainee: the powers of faith… … and wisdom.” – Anguttara Nikāya

These five faculties are relatively feeble in him: the faculties of faith … and wisdom. Because of the feebleness of these five faculties, with the breakup of the body, he attains Nibbāna through volitional exertion. This is how a person, with the breakup of the body, attains Nibbāna through volitional exertion. – Anguttara Nikāya

“And how, monks, does a person, in this very life, attain Nibbana through volitional exertion? Here, a monk dwells contemplating the unattractiveness of the body, perceiving repulsiveness in food, perceiving discontent with the entire world, contemplating impermanence in all formations; and the perception of death is well established within him.” – Anguttara Nikāya

“There are, O monks, four kinds of persons found existing in the world.What four?“Here, monks, in this very life a person attains Nibbāna through volitional exertion. Here, with the breakup of the body, a person attains final Nibbāna through volitional exertion. Here, in this very life a person attains final Nibbāna without volitional exertion. Here, with the breakup of the body, a person attains final Nibbāna without volitional exertion.”— Anguttara Nikāya