Theragāthā Ekakanipāta Tatiyavagga 1.21. Nigrodhattheragāthā “Nāhaṃ bhayassa bhāyāmi, Satthā no amatassa kovido; Yattha bhayaṃ nāvatiṭṭhati, Tena maggena vajanti bhikkhavo”ti. … Nigrodho thero ….