Kummopamasutta
“Bhūtapubbaṁ, bhikkhave, kummo kacchapo sāyanhasamayaṁ anunadītīre gocarapasuto ahosi. Siṅgālopi kho, bhikkhave, sāyanhasamayaṁ anunadītīre gocarapasuto ahosi. Addasā kho, bhikkhave, kummo kacchapo siṅgālaṁ dūratova gocarapasutaṁ. Disvāna soṇḍipañcamāni aṅgāni sake kapāle samodahitvā appossukko tuṇhībhūto saṅkasāyati. Siṅgālopi kho, bhikkhave, addasa kummaṁ kacchapaṁ dūratova gocarapasutaṁ. Disvāna yena kummo kacchapo tenupasaṅkami; upasaṅkamitvā kummaṁ kacchapaṁ paccupaṭṭhito ahosi: ‘yadāyaṁ kummo kacchapo soṇḍipañcamānaṁ aṅgānaṁ aññataraṁ vā aññataraṁ vā aṅgaṁ abhininnāmessati, tattheva naṁ gahetvā uddālitvā khādissāmī’ti. Yadā kho, bhikkhave, kummo kacchapo soṇḍipañcamānaṁ aṅgānaṁ aññataraṁ vā aññataraṁ vā aṅgaṁ na abhininnāmi, atha siṅgālo kummamhā nibbijja pakkāmi, otāraṁ alabhamāno.
The Simile of the Tortoise
“Once upon a time, mendicants, a tortoise was grazing along the bank of a river in the afternoon. At the same time, a jackal was also hunting along the river bank. The tortoise saw the jackal off in the distance hunting, so it drew its limbs and neck inside its shell, and kept passive and silent. But the jackal also saw the tortoise off in the distance grazing. So it went up to the tortoise and waited nearby, thinking, ‘When that tortoise sticks one or other of its limbs or neck out from its shell, I’ll grab it right there, rip it out, and eat it!’ But when that tortoise didn’t stick one or other of its limbs or neck out from its shell, the jackal left disappointed, since it couldn’t find a vulnerability.