Delayed speech as right speech
In the Abhaya Sutta (MN58), the Buddha taught:


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