The Jataka, Vol. II, tr. by W.H.D. Rouse, , at sacred-texts.com
"Best of all," etc.--This story the Master told whilst dwelling in the country near Dakkhiṇāgiri, about a gardener's son.
After the rains, the Master left Jetavana, and went on alms-pilgrimage in the
district about Dakkhiṇāgiri. A layman invited the Buddha and his company, and made them sit down in his grounds till he gave them of rice and cakes, Then he said, "If any of the holy Fathers care to see over the grounds, they might go along with the gardener;" and he ordered the gardener to supply them with any fruit they might fancy.
By and bye they came upon a bare spot. "What is the reason," they asked "that this spot is bare and treeless?" "The reason is," answered the gardener, "that a certain gardener's son, who had to water the saplings, thought he had better give them water in proportion to the length of the roots; so he pulled them all up to see, and watered them accordingly. The result was that the place became bare."
The Brethren returned, and told this to their Master. Said he, "Not now only has the lad destroyed a plantation; he did just the same before;" and then he told them an old-world tale.
Once upon a time, when a king named Vissasena was reigning over Benares, proclamation was made of a holiday. The park keeper thought he would go and keep holiday; so calling the monkeys that lived in the park, he said:
"This park is a great blessing to you. I want to take a week's holiday. Will you water the saplings on the seventh day?" "Oh, yes," said they; he gave them the watering-skins, and went his way.
The monkeys drew water, and began to water the roots.
The eldest monkey cried out: "Wait, now! It's hard to get water always. We must husband it. Let us pull up the plants,  and notice the length of their roots; if they have long roots, they need plenty of water; but short ones need but a little." "True, true," they agreed; then some of them pulled up the plants; then others put them in again, and watered them.
The Bodhisatta at the time was a young gentleman living in Benares. Something or other took him to this park, and he saw what the monkeys were doing.
"Who bids you do that?" asked he.
"Our chief," they replied.
"If that is the wisdom of the chief, what must the rest of you be like!" said he; and to explain the matter, he uttered the first stanza:
Hearing this remark, the monkeys rejoined with the second stanza:
To which the Bodhisatta replied by the third, as follows:
 When this discourse was ended, the Master identified the Birth: "The lad who destroyed the park was the monkey chief, and I was the wise man."
237:1 This is the same story as No. 46 (vol. i. of the translation, p. 118): it is briefer, and the verses are not the same. See Folk-Lore Journal, iii. 251; Cunningham, Bharhut, v.v. 5.