Mentioned in the Aṭṭhasālinī (p.336); it evidently refers to the Nivesaka Sutta in the Aṅguttaranikāya. (A.i.222)
The sutta states that it were easier for the four great elements to change their characteristics than for a Noble Disciple possessed with unvarying faith in the Buddha, the Dhamma, and the Saṅgha, to be born in purgatory among lower animals or in the peta-