Gadrabhasutta
“Seyyathāpi, bhikkhave, gadrabho gogaṇaṁ piṭṭhito piṭṭhito anubandho hoti: ‘ahampi dammo, ahampi dammo’ti. Tassa na tādiso vaṇṇo hoti seyyathāpi gunnaṁ, na tādiso saro hoti seyyathāpi gunnaṁ, na tādisaṁ padaṁ hoti seyyathāpi gunnaṁ. So gogaṇaṁyeva piṭṭhito piṭṭhito anubandho hoti: ‘ahampi dammo, ahampi dammo’ti.
The Donkey
“Suppose, mendicants, a donkey followed behind a herd of cattle, thinking: ‘I can moo too! I can moo too!’ But it doesn’t look like a cow, or sound like a cow, or leave a footprint like a cow. Still it follows behind a herd of cattle, thinking: ‘I can moo too! I can moo too!’