Pāli · Sutta Piṭaka (Pāli, Mahāsaṅgīti)Sa kho so, bhikkhave, evaṁ ussoḷhipannarasaṅgasamannāgato bhikkhu bhabbo abhinibbidāya, bhabbo sambodhāya, bhabbo anuttarassa yogakkhemassa adhigamāya. Seyyathāpi, bhikkhave, kukkuṭiyā aṇḍāni aṭṭha vā dasa vā dvādasa vā. Tānassu kukkuṭiyā sammā adhisayitāni sammā pariseditāni sammā paribhāvitāni. Kiñcāpi tassā kukkuṭiyā na evaṁ icchā uppajjeyya: ‘aho vatime kukkuṭapotakā pādanakhasikhāya vā mukhatuṇḍakena vā aṇḍakosaṁ padāletvā sotthinā abhinibbhijjeyyun’ti. Atha kho bhabbāva te kukkuṭapotakā pādanakhasikhāya vā mukhatuṇḍakena vā aṇḍakosaṁ padāletvā sotthinā abhinibbhijjituṁ.
Evameva kho, bhikkhave, evaṁ ussoḷhipannarasaṅgasamannāgato bhikkhu bhabbo abhinibbidāya, bhabbo sambodhāya, bhabbo anuttarassa yogakkhemassa adhigamāyā”ti.
Idamavoca bhagavā. Attamanā te bhikkhū bhagavato bhāsitaṁ abhinandunti.
English · Bhikkhu SujatoA mendicant who possesses these fifteen factors, including vigor, is capable of breaking out, becoming awakened, and reaching the supreme sanctuary from the yoke. Suppose there was a chicken with eight or ten or twelve eggs. And she properly sat on them to keep them warm and incubated. Even if that chicken doesn’t wish: ‘If only my chicks could break out of the eggshell with their claws and beak and hatch safely!’ Still they can break out and hatch safely.
In the same way, a mendicant who possesses these fifteen factors, including vigor, is capable of breaking out, becoming awakened, and reaching the supreme sanctuary from the yoke.”
That is what the Buddha said. Satisfied, the mendicants approved what the Buddha said.