The Law Code of Yājñavalkya 1.10.13

1.10.13

svastrīyo bhāgineyaḥ | ṛtvig uktalakṣaṇaḥ | jāmātā duhitur bhartā | triṇāciketaṃ yajurvedaikadeśaḥ tadvrataṃ ca tadvratācaraṇena yas tadadhyāyī sa triṇāciketaḥ | anyat prasiddhaṃ | ete ca pūrvoktāgryaśrotriyādyabhāve veditavyāḥ,

"A sister's son" is the son of one's sister. "An officiating priest" has the characteristics already stated. "A son-in-law" is the husband of one's daughter. The "Triṇāciketa" is a portion of the Yajurveda and the vow pertaining to it; one who studies that by observing that vow is a "Triṇāciketa." The rest is well known. And these are to be understood [as eligible] in the absence of the foremost [Brahmins], Vedic scholars, and so on mentioned earlier,