Candūpamāsutta
Sāvatthiyaṁ viharati. “Candūpamā, bhikkhave, kulāni upasaṅkamatha— apakasseva kāyaṁ, apakassa cittaṁ, niccanavakā kulesu appagabbhā. Seyyathāpi, bhikkhave, puriso jarudapānaṁ vā olokeyya pabbatavisamaṁ vā nadīviduggaṁ vā— apakasseva kāyaṁ, apakassa cittaṁ; evameva kho, bhikkhave, candūpamā kulāni upasaṅkamatha— apakasseva kāyaṁ, apakassa cittaṁ, niccanavakā kulesu appagabbhā.
Like the Moon
At Sāvatthī. “Mendicants, you should approach families like the moon: withdrawn in body and mind, ever the newcomer, and never rude. Suppose a person were to look down at an old well, a rugged cliff, or an inaccessible riverland. They’d withdraw their body and mind. In the same way, you should approach families like the moon: withdrawn in body and mind, always the newcomer, and never rude.