Ashtavakra said : The two friends, Agni and Indra, move together; the celestials sages are Two Narada and Parvata, the Ashvins are Two, the wheels of a car are two. It is Two, husband and wife, that live together as ordained by the deity.
अष्टावक्र उवाच द्वाविन्द्राग्नी चरतो वै सखायौ द्वौ देवर्षी नारदपर्वतौ च। द्वावश्विनौ द्वे रथस्यापि चक्रे भार्यापती द्वौ विहितौ विधात्रा॥