Pārivāsikakkhandhaka

Vinayapiṭaka · Cūḷavagga (1) · Vol. 6 · Section 324

[324] Bhikkhus, a bhikkhu on probation (parivāsa), when arriving as a visitor, must announce it; to a visitor who arrives, he must announce it; at the Uposatha (uposatha) he must announce it; at the Pavāraṇā (pavāraṇā) he must announce it; if he is sick, he must have it announced even through a messenger.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 2 other places

Vol. 6 · Section 347 — Pārivāsikakkhandhaka
Vol. 6 · Section 358 — Pārivāsikakkhandhaka