Parisāsutta
“Cattārome, bhikkhave, parisadūsanā. Katame cattāro? Bhikkhu, bhikkhave, dussīlo pāpadhammo parisadūsano; bhikkhunī, bhikkhave, dussīlā pāpadhammā parisadūsanā; upāsako, bhikkhave, dussīlo pāpadhammo parisadūsano; upāsikā, bhikkhave, dussīlā pāpadhammā parisadūsanā. Ime kho, bhikkhave, cattāro parisadūsanā.
Assembly
“Mendicants, these four corrupt an assembly. What four? A monk, nun, layman, or laywoman who is unethical, of bad character. These are the four that corrupt an assembly.