I have heard that on one occasion the Blessed One was staying in Savatthi at Jeta's Grove, Anathapindika's monastery. There he addressed the monks, "Monks!"
"Yes, lord," the monks replied.
The Blessed One said: "Monks, speech endowed with four characteristics is well-spoken, not poorly spoken — faultless & not to be faulted by the wise. Which four? There is the case where a monk says only what it well-spoken, not what is poorly spoken; only what is just, not what is unjust; only what is endearing, not what is unendearing; only what is true, not what is false. Speech endowed with these four characteristics is well-spoken, not poorly spoken — faultless & not to be faulted by the wise."
That is what the Blessed One said. Having said this, the One Well-Gone, the Teacher, said further:
Then Ven. Vangisa, rising from his seat, arranging his robe over one shoulder, faced the Blessed One with his hands palm-to-palm in front of his heart and said, "An inspiration has come to me, Blessed One! An inspiration has come to me, One Well-Gone!"
"Let the inspiration come to you, Vangisa," the Blessed One said.
Then Ven. Vangisa praised the Blessed One to his face with these attractive verses: