๑. สุทธกสูตร
TIPITAKA Volume 16 : PALI ROMAN Sutta Pitaka Vol 8 : Sutta. Saṃ. Ni. Lābhasakkārasaṃyuttaṃ ------ paṭhamavaggo paṭhamo
[536] Evamme sutaṃ ekaṃ samayaṃ bhagavā sāvatthiyaṃ viharati jetavane anāthapiṇḍikassa ārāme . tatra kho bhagavā bhikkhū āmantesi bhikkhavoti. Bhadanteti te bhikkhū bhagavato paccassosuṃ.