The Jataka, Vol. II, tr. by W.H.D. Rouse, , at sacred-texts.com
"See that twice-born bird," etc.--This story the Master told while staying in Jetavana, about a hypocrite. When he was brought before the Master, the Master said, "Brethren, he was a hypocrite of old just as he is now," and told the following story.
 Once on a time, when Brahmadatta was king of Benares, the Bodhisatta became a Fish in a certain pond in the Himalaya region, and a great shoal went with him. Now a Crane desired to eat the fish. So in a place near the pond he drooped his head, and spread out his wings, and looked vacantly, vacantly at the fish, waiting till they were off their guard 1. At the same moment the Bodhisatta with his shoal came to that place in search of food. And the shoal of fish on seeing the crane uttered the first stanza:--
Then the Bodhisatta looked, and uttered the second stanza:
Thereupon the fish splashed in the water and drove the crane away.
When this discourse was ended, the Master identified the Birth:--"This hypocrite was the Crane, and I was the chief of the shoal of fish."
162:1 A crane's sleep" is an Indian proverb for trickery.
162:2 dijo is used of a bird as born in the egg and from the egg. It is also applied to Brahmins, and so conveys an additional notion of piety.