Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Sāpūgiya Sutta
Sāpūgiya Sutta:The inhabitants of Sāpūga visit Ananda,who is living there.He tells them of the four factors of exertion (padhāniyangāni): for the utter purification of morals,thought,view,and for the utter purity of release.A.ii.194f.