Hardship qua stay at a solitary place- A type of Pariṣaha (hardship);
while undertaking a special course of sādhanā (spiritual practice) at a solitary place (like cremation grounds), which is suitable for such sādhanā, the ascetic may have to encounter with incidence of terror; at such time, he should endure it with equanimity (without being frightened or without quitting the place).
susāṇe sunnagāre vā rukkhamūle va egao. akukkuo nisīejjā na ya vittāsae paraṃ...
tattha se ciṭṭhamāṇassa uvasaggābhidhārae. saṃkābhīo na gacchejjā uṭṭhittā annamāsaṇaṃ...
(U 2.20, 21)