Mucalindasutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā uruvelāyaṁ viharati najjā nerañjarāya tīre mucalindamūle paṭhamābhisambuddho. Tena kho pana samayena bhagavā sattāhaṁ ekapallaṅkena nisinno hoti vimuttisukhapaṭisaṁvedī.
With Mucalinda
So I have heard. At one time, when he was first awakened, the Buddha was staying in Uruvelā at the root of the Mucalinda tree on the bank of the Nerañjarā River. There the Buddha sat cross-legged for seven days without moving, experiencing the bliss of freedom.