Skanda Purana — Mahesvara Khanda, Shloka 19
तस्य नाम ददौ स्कंदः सिद्धकूप इति स्मृतः । कृष्माष्टम्यां चतुर्दश्यामुपवासी नरः स्वयम्
tasya nāma dadau skaṃdaḥ siddhakūpa iti smṛtaḥ | kṛṣmāṣṭamyāṃ caturdaśyāmupavāsī naraḥ svayam
スカンダはそれに名を授け、「シッダクーパ（成就の井戸）」として記憶される。クリシュナーシュタミーと月の十四日には、人は自ら断食して斎戒すべきである。
Lomaharṣaṇa Sūta (deduced from section context)
Tirtha: Siddhakūpa
Type: kund
Scene: Skanda, as divine authority, bestows the name ‘Siddhakūpa’ upon the newly formed well; sages record it, while devotees prepare for fasting on the dark eighth and fourteenth lunar days.
FAQs
A tīrtha gains sanctity through divine naming, and disciplined observance (fasting on specific tithis) aligns the devotee with that sanctity.
Siddhakūpa, the sacred well created by the spear’s passage and filled with Pātāla-Gaṅgā water.
Upavāsa (fasting) on Kṛṣṇāṣṭamī and on Caturdaśī.