नाना स्त्री पुत्राणां तु संस्कृत असंस्कृतयोः कन्या कृत क्षतयोर् अभावे च एकस्याः पुत्रयोर् यमयोर् वा पूर्व जन्मना ज्येष्ठ भावः ॥
With regard to sons of many wives:-- Of sons of two wives of whom only one woman has gone through all the necessary religious ceremonials, or both of whom have not, as maidens, observed necessary religious rites, or one of whom has brought forth twins, it is by birth that primogenitureship is decided.