Sālasutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā kosalesu viharati sālāya brāhmaṇagāme. Tatra kho bhagavā bhikkhū āmantesi: “seyyathāpi, bhikkhave, ye keci tiracchānagatā pāṇā, sīho migarājā tesaṁ aggamakkhāyati, yadidaṁ—thāmena javena sūrena; evameva kho, bhikkhave, ye keci bodhipakkhiyā dhammā, paññindriyaṁ tesaṁ aggamakkhāyati, yadidaṁ—bodhāya.
At Sālā
So I have heard. At one time the Buddha was staying in the land of the Kosalans near the brahmin village of Sālā. There the Buddha addressed the mendicants: “Mendicants, the lion, king of beasts, is said to be the best of animals in terms of strength, speed, and courage. In the same way, the faculty of wisdom is said to be the best of the qualities on the side of awakening; that is, for becoming awakened.