Samuccayakkhandhaka

Vinayapiṭaka · Cūḷavagga (1) · Vol. 6 · Section 555

[555] Two bhikkhus have committed an offense of saṅghādisesa. They hold the view that those offenses are saṅghādisesas. One conceals it; one does not conceal it. The one who conceals it should be made to confess an offense of wrong-doing (dukkaṭa). And, having granted him probation (parivāsa) in accordance with the period of concealment, penance (mānatta) should be granted to both.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 6 · Section 565 — Samuccayakkhandhaka