Skanda Purana — Prabhasa Khanda, Shloka 21
राजोवाच । कर्मणा केन पितरो निरयस्था द्विजोत्तमाः । स्वर्गं यांति सुपुत्रेण तारिताः प्रोच्यतां स्फुटम्
rājovāca | karmaṇā kena pitaro nirayasthā dvijottamāḥ | svargaṃ yāṃti suputreṇa tāritāḥ procyatāṃ sphuṭam
国王说道：噢，最尊贵的婆罗门啊，凭借何种仪轨，那些住于地狱的祖灵，因贤善之子得以救度，而升至天界？请明白开示。
King (Rājā)
Listener: assembled brāhmaṇas (dvijottamāḥ)
Scene: The king, hands folded, questions the assembled brāhmaṇas; the queen stands beside him; scholars sit with manuscripts, ready to prescribe rites for pitṛ deliverance.
FAQs
One should actively seek the correct dharmic means to uplift ancestors, not rely on vague intention.
No tīrtha is named in this question; it introduces the topic of pitṛ-delivering ritual action.
The verse asks for the specific ‘karma’ (rite) that transfers ancestors from niraya to svarga.