Tuvaṭṭavagga

Vinayapiṭaka · Parivāra · Vol. 8 · Section 712

[712] Walking on tour (cārikā) outside the realm, in a place agreed to be risky and fraught with peril, without a caravan, she [a bhikkhunī] commits two offenses (āpatti): as she is setting out, in the act of undertaking it, there is an offense of wrong-doing (dukkaṭa); when she has gone, there is a pācittiya offense.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.