Śatapatha Brāhmaṇa ("of a hundred paths") 1.9.3.18

1.9.3.18

sa upatiṣṭhate | agne gṛhapate sugṛhapatistvayāgne 'haṃ gṛhapatinā bhūyāsaṃ sugṛhapatistvaṃ mayāgne gṛhapatinā bhūyā iti nātra tirohitamivāstyasthūri nau gārhapatyāni santvityanārttāni nau gārhapatyāni santvityevaitadāha śataṃ himā iti śataṃ varṣāṇi jīvyāsamityevaitadāha tadapyetadbruvannādriyetāpi hi bhūyāṃsi śatādvarṣebhyaḥ puruṣo jīvati tasmādapyetadbruvannādriyeta

Thereupon he steps to (upa-sthâ) the Gârhapatya fire. Twofold is the reason why he steps to the Gârhapatya: the Gârhapatya is a house, and a house is a safe resort, hence he thereby stays in a house, that is, in a safe resort. And, besides, what full measure of human life there is for him here, that he thereby attains (upa-sthâ). This is why he steps to the Gârhapatya fire.