Saṃyutta Nikāya 43

1. Paṭhamavagga

4. Suñña­ta­samā­dhi­sutta

“Katamo ca, bhikkhave, asaṅ­kha­ta­gāmi­maggo? Suññato samādhi, animitto samādhi, appaṇihito samādhi—ayaṃ vuccati, bhikkhave, asaṅ­kha­ta­gāmi­maggo … pe ….

Catutthaṃ.