स यद्येकपुत्रः पुत्रोत्पत्तावस्य प्रयतेत ॥ कZ_०१.१७.४८ ॥
sa yady ekaputraḥ putrotpattāv asya prayateta
S’il n’a qu’un seul fils, il doit s’efforcer d’engendrer d’autres fils.
Redundancy reduces the probability of succession failure due to death, incapacity, or unfitness of a lone heir.