Right Speech

Buddha:

[1] In the case of words that the Tathagata knows to be unfactual, untrue, unbeneficial (or: not connected with the goal), unendearing & disagreeable to others, he does not say them.

[2] In the case of words that the Tathagata knows to be factual, true, unbeneficial, unendearing & disagreeable to others, he does not say them.

[3] In the case of words that the Tathagata knows to be factual, true, beneficial, but unendearing & disagreeable to others, he has a sense of the proper time for saying them.

[4] In the case of words that the Tathagata knows to be unfactual, untrue, unbeneficial, but endearing & agreeable to others, he does not say them.

[5] In the case of words that the Tathagata knows to be factual, true, unbeneficial, but endearing & agreeable to others, he does not say them.

[6] In the case of words that the Tathagata knows to be factual, true, beneficial, and endearing & agreeable to others, he has a sense of the proper time for saying them. Why is that? Because the Tathagata has sympathy for living beings."

The source for the above material:
MN 58 Abhaya Sutta: To Prince Abhaya (On Right Speech) Translated from the Pali by Thanissaro Bhikkhu PTS: M i 392 Source: Transcribed from a file provided by the translator. Copyright © 1997 Thanissaro Bhikkhu. Access to Insight edition © 1997. For free distribution. This work may be republished, reformatted, reprinted, and redistributed in any medium. It is the author's wish, however, that any such republication and redistribution be made available to the public on a free and unrestricted basis and that translations and other derivative works be clearly marked as such.