Cetokhilasutta 4.3

4.3

Yo so, bhikkhave, bhikkhu kāmesu avītarāgo hoti avigatacchando avigatapemo avigatapipāso avigatapariḷāho avigatataṇho, tassa cittaṃ na namati ātappāya anuyogāya sātaccāya padhānāya.

This being so, their mind doesn’t incline toward keenness, commitment, persistence, and striving.