सङ्करो नरकायैव कुलघ्नानां कुलस्य च। पतन्ति पितरो ह्येषां लुप्तपिण्डोदकक्रियाः॥

In this shloka from Srimad Bhagavad Gita (Arjuna Vishada Yoga/Chapter 1/Shlokas 42), Arjuna continues to worry about the consequences of the war. The intermingling of varnas/kulas results in naraka, for both the kula and the destroyers of the kulas. [More importantly,] the pitṛs of these kulas fall, on being deprived of piṇḍodakakriyāḥ (śrāddham, the offering of food and…

यथाक्रमं यथान्यायं सागराणां महायशः । कृतोदकश्शुची राजा स्वपुरं प्रविवेश ह ।

— श्रीमद्वाल्मीकिरामायणे बालकाण्डे चतुश्चत्वारिंशस्सर्गः (१७-१८) Through this gem-of-a-shloka, sage Vishwaamitra narrates to Shri Raama that king Bhageeratha performed पितृतर्पणम् (offering water) and पिण्डप्रदानम् (offering food) to his great-grandfathers (the 60000 sons of king sagara), as per his family customs and in accordance with the shaastras. By doing this, the king became शुचि (pure) and then…