Mārādisuttaekādasaka
Sāvatthinidānaṁ. Ekamantaṁ nisinno kho āyasmā rādho bhagavantaṁ etadavoca: “sādhu me, bhante, bhagavā saṅkhittena dhammaṁ desetu, yamahaṁ bhagavato dhammaṁ sutvā eko vūpakaṭṭho appamatto ātāpī pahitatto vihareyyan”ti.
Eleven Discourses on Māra, Etc.
At Sāvatthī. Seated to one side, Venerable Rādha said to the Buddha: “Sir, may the Buddha please teach me Dhamma in brief. When I’ve heard it, I’ll live alone, withdrawn, diligent, keen, and resolute.”