Aṅguttara Nikāya 4 16. Indriyavagga 154. Satibalasutta “Cattārimāni, bhikkhave, balāni. Katamāni cattāri? Satibalaṃ, samādhibalaṃ, anavajjabalaṃ, saṅgahabalaṃ—imāni kho, bhikkhave, cattāri balānī”ti. Catutthaṃ.