디가 니카야 1:1119
SUJATOIṅgha tumhe, ānanda, sāratthe ghaṭatha anuyuñjatha, sāratthe appamattā ātāpino pahitattā viharatha.
Please, Ānanda, you must all strive and practice for your heart’s goal! Meditate diligent, keen, and resolute for your heart’s goal!