Manava Dharmashastra 9.216

9.216

ūrdhvaṃ vibhāgāj jātas tu pitryam eva hared dhanam
saṃsṛṣṭās tena vā ye syur vibhajeta sa taiḥ saha //

But a son, born after partition, shall alone take the property of his father, or if any (of the other sons) be reunited with the (father), he shall share with them.