• Chapāna 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. Vsm.484.