One verse

Srimad Bhagavatam 9.20.16

9.20.16

ओमित्युक्ते यथाधर्ममुपयेमे शकुन्तलाम् । गान्धर्वविधिना राजा देशकालविधानवित् ॥ १६ ॥

om ity ukte yatha-dharmam upayeme sakuntalam gandharva-vidhina raja desa-kala-vidhanavit

om iti ukte
by reciting the Vedic pranava, invoking the Supreme Personality of Godhead to witness the marriage
yatha-dharmam
exactly according to the principles of religion (because Narayana becomes the witness in an ordinary religious marriage also)
upayeme
he married
sakuntalam
the girl Sakuntala
gandharva-vidhina
by the regulative principle of the Gandharvas, without deviation from religious principles
raja
Maharaja Dusmanta
desa-kala-vidhana-vit
completely aware of duties according to time, position and objective

When Sakuntala responded to Maharaja Dusmanta’s proposal with silence, the agreement was complete. Then the King, who knew the laws of marriage, immediately married her by chanting the Vedic pranava (omkara), in accordance with the marriage ceremony as performed among the Gandharvas.