अहोरात्रो वै प्रजापतिस्तस्याहरेव प्राणो रात्रिरेव रयिः प्राणं वा एते
प्रस्कन्दन्ति ये दिवा रत्या संयुज्यन्ते ब्रह्मचर्यमेव तद्यद्रात्रौ
रत्या संयुज्यन्ते ॥ १.१३॥
ahorātro vai prajāpatistasyāhareva prāṇo rātrireva rayiḥ prāṇaṃ vā ete
praskandanti ye divā ratyā saṃyujyante brahmacaryameva tadyadrātrau
ratyā saṃyujyante .. 1.13..
Day and night, verily, are Prajapati. Of these, day is the eater, prana and night, the food, rayi. Those who join in sexual enjoyment by day verily dissipate life; but to join in sexual enjoyment by night is, verily, chastity.