Vaishnava Dharmashastra 18.43

18.43

paitṛkaṃ tu yadā dravyam anavāptaṃ yad āpnuyāt
na tat putrair bhajet sārdham akāmaḥ svayam arjitam //

And if a man recovers (a debt or other property), which could not before be recovered by his father, he shall not, unless by his own free will, divide it with his sons; for it is an acquisition made by himself.