One verse

Srimad Bhagavatam 4.16.13

4.16.13

नादण्ड्यं दण्डयत्येष सुतमात्मद्विषामपि । दण्डयत्यात्मजमपि दण्ड्यं धर्मपथे स्थित: ॥ १३ ॥

nadandyam dandayaty esa sutam atma-dvisam api dandayaty atmajam api dandyam dharma-pathe sthitah

na
not
adandyam
not punishable
dandayati
punishes
esah
this King
sutam
the son
atma-dvisam
of his enemies
api
even
dandayati
he punishes
atma-jam
his own son
api
even
dandyam
punishable
dharma-pathe
on the path of piety
sthitah
being situated.

Since this King will always remain on the path of piety, he will be neutral to both his son and the son of his enemy. If the son of his enemy is not punishable, he will not punish him, but if his own son is punishable, he will immediately punish him.