Shiva Purana

siva.sh/siva-purana/rudra-samhita/180/35

राज्यं परस्य स्वबलेन हृत्वा भुंक्तेऽथवा स्वं पितुरेव दृष्टम् ।। च प्रोच्यते पुत्र इह त्वमुत्र पुत्री स तेनापिभवेत्पितासौ ।। ३५ ।।

sanskrit

He alone merits to be the son who enjoys either the inherited kingdom of his father or the kingdom of another taken by force. That father alone can call himself possessed of a son with such a son.

english translation

rAjyaM parasya svabalena hRtvA bhuMkte'thavA svaM pitureva dRSTam || ca procyate putra iha tvamutra putrI sa tenApibhavetpitAsau || 35 ||

hk transliteration by Sanscript