On a son or a grandson being born in their (respective) families, our ancestors in the Pitris region, either grieve or rejoice, thinking,
स्वे स्वे किल कुले जाते पुत्रे नप्तरि वा पुनः। पितरः पितृलोकस्था: शोचन्ति च हसन्ति च॥