मातुरग्रेऽधिजननं द्वितीयं मौञ्जिबन्धने ।
तृतीयं यज्ञदीक्षायां द्विजस्य श्रुतिचोदनात् ॥
mātur agre’dhi-jananaṁ dvitīyaṁ mauñji-bandhane |
tṛtīyaṁ yajña-dīkṣāyāṁ dvijasya śruti-codanāt ||
(Manu Smṛti: 2.169)
“As per the precept of the Śruti, a twice-born’s birth is first from a mother, second by the tying of mauñji [i.e., the upanayana-saṁskāra, which involves a ritual in which mauñji, a type of cane grass, is tied as a girdle around the initiate’s waist], and the third by yajña-dīkṣā [i.e., initiation into performance of Vedic sacrifice].”