Tapokammasutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā uruvelāyaṁ viharati najjā nerañjarāya tīre ajapālanigrodhamūle paṭhamābhisambuddho. Atha kho bhagavato rahogatassa paṭisallīnassa evaṁ cetaso parivitakko udapādi: “mutto vatamhi tāya dukkarakārikāya. Sādhu mutto vatamhi tāya anatthasaṁhitāya dukkarakārikāya. Sādhu vatamhi mutto bodhiṁ samajjhagan”ti.
Mortification
So I have heard. At one time, when he was first awakened, the Buddha was staying in Uruvelā at the root of the goatherd’s banyan tree on the bank of the Nerañjarā River. Then as he was in private retreat this thought came to his mind, “I am truly freed from that grueling work! Thank goodness I’m freed from that pointless grueling work. Thank goodness I’m freed and have attained awakening.”