Upajjhāyasutta
Atha kho aññataro bhikkhu yena sako upajjhāyo tenupasaṅkami; upasaṅkamitvā sakaṁ upajjhāyaṁ etadavoca: “etarahi me, bhante, madhurakajāto ceva kāyo, disā ca me na pakkhāyanti, dhammā ca maṁ nappaṭibhanti, thinamiddhañca me cittaṁ pariyādāya tiṭṭhati, anabhirato ca brahmacariyaṁ carāmi, atthi ca me dhammesu vicikicchā”ti.
Mentor
Then a mendicant went up to his own mentor, and said, “Now, sir, my body feels like it’s drugged. I’m disorientated, the teachings don’t spring to mind, and dullness and drowsiness fill my mind. I lead the spiritual life dissatisfied, and have doubts about the teachings.”