Chappāṇakopama Sutta
v.l. Chapāṇa Sutta.– If a man were to catch six animals — a snake, a crocodile, a bird, a dog, a jackal and a monkey — and tether them with ropes, they would struggle to be free and to make off, each to his own range or pasture. So do a man’s six senses. If the animals are strongly tethered, they will, with time, grow weary and rest. So will the six senses if one practises attention to the body. S.iv.197; cp. Vism.484.