增壹阿含經 9.9.p3

9.9.p3

“One should contemplate the foul discharges and perceptions of impurity. If one becomes distracted, then notions of desire will arise where there were none and notions of desire that have arisen will increase … anger … sleepiness … [agitation] … notions of doubt will arise where there were none and doubts that have arisen will increase.