Makkaṭasutta
“Atthi, bhikkhave, himavato pabbatarājassa duggā visamā desā, yattha neva makkaṭānaṁ cārī na manussānaṁ. Atthi, bhikkhave, himavato pabbatarājassa duggā visamā desā, yattha makkaṭānañhi kho cārī, na manussānaṁ. Atthi, bhikkhave, himavato pabbatarājassa samā bhūmibhāgā ramaṇīyā, yattha makkaṭānañceva cārī manussānañca. Tatra, bhikkhave, luddā makkaṭavīthīsu lepaṁ oḍḍenti makkaṭānaṁ bādhanāya.
A Monkey
“Mendicants, in the Himalayas there are regions that are rugged and impassable. In some such regions, neither monkeys nor humans can go, while in others, monkeys can go but not humans. There are also level, pleasant places where both monkeys and humans can go. There hunters set snares of tar on the monkey trails to catch the monkeys.