अथास्या ऊरू विहापयति विजिहीथां द्यावापृथिवी इति तस्यामर्थं निष्ठाय मुखे- न मुख ँ संधाय त्रिरेनामनुलोमामनुमा- र्ष्टि विष्णुर्योनिं कल्पयतु त्वष्टा रूपाणि पिंशतु ।आसिञ्चतु प्रजापतिर्धाता गर्भं दधातु ते ।गर्भं धेहि सिनीवालि गर्भं धेहि पृथुष्टुके ।गर्भं ते अश्विनौ देवावा- धत्तां पुष्करस्रजौ ॥ २१ ॥
In plain words
Then he parts her thighs, saying, 'let heaven and earth open.' He settles himself in her, joins his mouth to hers, and strokes her three times along the line of the hair, speaking: 'May Viṣṇu shape the womb, may Tvaṣṭṛ carve the form, may Prajāpati pour the seed in, may Dhātṛ set the child in place. Place the child, Sinīvālī. Place the child, broad-tressed one. May the two Aśvins, crowned with lotus, place the child in you.'
Close to the Sanskrit
Then he causes her two thighs to part, [saying] 'let heaven and earth separate,' thus; having settled his organ in her, having joined mouth to mouth, he strokes her thrice along the grain of the hair: 'may Viṣṇu prepare the womb, may Tvaṣṭṛ shape the forms, may Prajāpati pour in, may Dhātṛ place the embryo in you. Place the embryo, O Sinīvālī; place the embryo, O broad-tressed one; may the two Aśvins, the gods garlanded with lotus, place the embryo in you.'