With SāriputtaSāriputtasutta

So I have heard.Evaṁ me sutaṁ— At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery.ekaṁ samayaṁ bhagavā sāvatthiyaṁ viharati jetavane anāthapiṇḍikassa ārāme. Now at that time Venerable Sāriputta was sitting not far from the Buddha, cross-legged, his body set straight, and mindfulness brought to the present.Tena kho pana samayena āyasmā sāriputto bhagavato avidūre nisinno hoti pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya parimukhaṁ satiṁ upaṭṭhapetvā. The Buddha saw him meditating there.Addasā kho bhagavā āyasmantaṁ sāriputtaṁ avidūre nisinnaṁ pallaṅkaṁ ābhujitvā ujuṁ kāyaṁ paṇidhāya parimukhaṁ satiṁ upaṭṭhapetvā.

Then, understanding this matter, on that occasion the Buddha expressed this heartfelt sentiment:Atha kho bhagavā etamatthaṁ viditvā tāyaṁ velāyaṁ imaṁ udānaṁ udānesi:

“As a rocky mountain“Yathāpi pabbato selo, is unwavering and well grounded,acalo suppatiṭṭhito; so when delusion ends,Evaṁ mohakkhayā bhikkhu, a monk, like a mountain, doesn’t tremble.”pabbatova na vedhatī”ti.