Manusmriti
उपसर्जनं प्रधानस्य धर्मतो नोपपद्यते । पिता प्रधानं प्रजने तस्माद् धर्मेण तं भजेत् ॥ १२१ ॥
The representative (the son begotten on the wife) is not invested with the right of the principal (the eldest brother to an additional share); the principal (became) a father on the procreation (of a son by his younger brother); hence one should give a share to the (son begotten on the wife of the elder brother) according to the rule (stated above).
english translation
upasarjanaM pradhAnasya dharmato nopapadyate । pitA pradhAnaM prajane tasmAd dharmeNa taM bhajet ॥ 121 ॥
hk transliteration by Sanscriptउपसर्जनं प्रधानस्य धर्मतो नोपपद्यते । पिता प्रधानं प्रजने तस्माद् धर्मेण तं भजेत् ॥ १२१ ॥
The representative (the son begotten on the wife) is not invested with the right of the principal (the eldest brother to an additional share); the principal (became) a father on the procreation (of a son by his younger brother); hence one should give a share to the (son begotten on the wife of the elder brother) according to the rule (stated above).
english translation
upasarjanaM pradhAnasya dharmato nopapadyate । pitA pradhAnaM prajane tasmAd dharmeNa taM bhajet ॥ 121 ॥
hk transliteration by Sanscript