"They that with speech inopportune,"--This story was told by the Master at Jetavana about Kokalika. The introductory story is told in full in the Takkarika Birth.
"Once upon a time when Brahmadatta was reigning in Benares, the Bodhisattva was his valued minister. Now the king was very talkative. Thought the Bodhisattva, 'I will put an end to his talkativeness,' and went about looking for an apt illustration. So one day the king came to his garden and sat down on the royal slab of stone. Above his head was a mango tree and there in a crow's nest a black cuckoo had laid her egg and gone off. The female crow watched over that cuckoo's egg. By and bye a young cuckoo came forth from it The crow thinking it was her own offspring took care of it, bringing food for it in her beak. The young bird while still unfledged uttered a cuckoo cry prematurely. The crow thought, 'This young bird even now utters a strange note. What will it do, when it is older?' And so she killed it by pecking it with her beak and threw it out of the nest, and it fell at the king's feet. The king asked the Bodhisattva, 'What is the meaning of this, my friend?' Thought the Bodhisattva, 'I am seeking for an illustration to teach the king a lesson, and now I have got one.' So he said, 'Garrulous folk, Great King, who talk too much out of season, meet with a fate like this. This young cuckoo, sire, being fostered by the crow, while yet unfledged, uttered a premature cry. So the crow knew it was not her offspring and killed it by pecking it with her beak and threw it out of the nest. All those that are too talkative out of season, be they men or beasts, suffer like trouble.' And with these words he recited these stanzas:
"'They that with speech inopportune offend
"'The sage his measured words discreetly guides,
"The king, after hearing the religious teaching of the Bodhisattva, thenceforth became more measured in his words, and increasing the glory of the Bodhisattva ever gave him more and more."
The Master, having brought his lesson to an end, identified the Birth: "Kokalika in those days was the young cuckoo, and I myself was the wise minister."