Skanda Purana — Mahesvara Khanda, Shloka 150
नेन्दुं न तारकाश्चैव नादयेन्नात्मनः शिरः । स्वस्रा दिहित्रा मात्रा वा नैकांतासन माचरेत्
nenduṃ na tārakāścaiva nādayennātmanaḥ śiraḥ | svasrā dihitrā mātrā vā naikāṃtāsana mācaret
不应凝视明月或群星，也不应因躁动或炫示而击打自己的头。亦不应与姊妹、女儿，乃至母亲，在完全隐密的独处中同坐。
Lomaharṣaṇa (Sūta) to the sages (deduced from Māheśvarakhaṇḍa context)
Scene: A devotee sits in a temple corridor with eyes lowered, not looking up at moon or stars; he steadies his mind, hands on mālā; a second vignette shows him refusing an invitation to sit alone in a secluded room, choosing an open courtyard instead; self-harm is negated by a calm posture and composed face.
FAQs
A disciplined devotee avoids both agitation and situations that can invite suspicion or mental disturbance.
No tīrtha is mentioned; the verse is about ethical safeguards in conduct.
Behavioral restraints: avoid gazing at moon/stars (as prescribed in this observance), avoid self-harm gestures, and avoid secluded sitting with women relatives.