Atharvavedabrahmana 4.6

4.6

brahma ha vai prajā mṛtyave samprāyacchat, brahmacāriṇameva na sampradadau,
sa hovācāsyāmasminniti kimiti yāṃ rātrīṃ samidhamanāhṛtya vasettāmāyuṣo'varundhīyeti, tasmād brahmacāryyaharahaḥ samidha āhṛtya
sāyaṃ prātaragniṃ paricaret, noparyyupasādayet, atha pratiṣṭhāpayet yaduparyyupasādayejjīmūtavarṣo tadahaḥ, parjjanyo bhavati, te devā abruvan
brāhmaṇo vā ayaṃ brahmacaryyañcariṣyati brūtāsmai bhikṣā iti,
gṛhapatirbrūta bahucārī gṛhapatnya iti kimasyā vṛṅktātādadatyā
iti, dūṣṭāpūrtta-sukṛtadraviṇamavarundhyāditi, tasmād brahmacāriṇe'
haraharbhikṣāṃ dadyādgṛhiṇīmāmiyuriṣṭāpūrttaṃ (1) sukṛtadraviṇamavarundhyāditi | saptamīṃ nātinayetsaptamīmatinayana brahmacārī
bhavati, samiddhaiñca saptarātramacaritavān brahmacārī punarapaneyo
bhavati