Manusmriti
स्वक्षेत्रे संस्कृतायां तु स्वयमुत्पादयेद् हि यम् । तमौरसं विजानीयात् पुत्रं प्राथमकल्पिकम् ॥ १६६ ॥
Him whom a man begets on his own wedded wife, let him know to be a legitimate son of the body (Aurasa), the first in rank.
english translation
svakSetre saMskRtAyAM tu svayamutpAdayed hi yam । tamaurasaM vijAnIyAt putraM prAthamakalpikam ॥ 166 ॥
hk transliteration by Sanscript