It is said that arahants never dream. What are the textual sources for this claim? On various web pages relating to the Dhamma I have read the claim that arahants never dream. A few examples:


Buddhist scholar Lily de Silva writes:



  We may also note the tradition maintaining that arahants never dream, maybe because they have attained such perfect mental health that there is no necessity to release tension through dreams.



The ven. Dhammananda Maha Thera writes:



  Buddhas and Arahants never dream. The first three kinds of dream cannot occur in their minds, because their minds have been permanently 'stilled' and cannot be activated to dream. The last kind of dream cannot happen to them because they have eradicated all their craving energy completely, and there is no 'residual' energy of anxiety or unsatisfied desire to activate the mind to produce dreams. 



And the Czech monk U Sarana writes:



  At that time Mahasi Sayadaw told to U Pandita that to his (Mahasi Sayadaw's) surprise, Mahasi Sayadaw had a dream. It is impossible for an Arahant to have a dream - and thus Sayadaw U Pandita knew, that Mahasi Sayadaw was not an Arahant at the time when this was said.


Surprisingly, I have not been able to find any Suttas or other textual sources for the claim that arahants never dream. Do any of you guys know of such sources? Is it in the Suttas, the Abhidhamma, the commentaries, or in a later text such as the Visuddhimagga? Thanks in advance for your answers!
Dreams are not mentioned a lot int he suttas. Perhaps you can search the vinaya instead of the suttas.
THe best there is for the suttas is ''the lack of evil dreams'', from metta


  "Monks, eleven advantages are to be expected from the release
  (deliverance) of heart by familiarizing oneself with thoughts of
  loving-kindness[1], by the cultivation of loving-kindness, by
  constantly increasing these thoughts, by regarding loving-kindness as
  a vehicle (of expression), and also as something to be treasured, by
  living in conformity with these thoughts, by putting these ideas into
  practice, and by establishing them. What are the eleven?
  
  "He sleeps in comfort. He awakes in comfort He sees no evil dreams.
  http://obo.genaud.net/dhamma-vinaya/ati/an/11_elevens/an11.016.piya.ati.htm


there is the same thing with mindfulness http://obo.genaud.net/dhamma-vinaya/pts/an/05_fives/an05.210.hare.pts.htm

In the suttanipata, the buddha says dreams are worthless, contrary to what puthujjanas believe


  Who has destroyed (belief) in omens, in luck, the occurrence of dreams
  and other signs such, who is rid of the bane of what is auspicious,
  such a one rightly would wander in the world.


https://www.dhammatalks.org/suttas/KN/StNp/StNp2_13.html


  Whoso ’mong them strong efforts made resembling Brahma, best, he never
  did engage in sex not even in a dream.
  https://www.dhammatalks.org/suttas/KN/StNp/StNp2_7.html
  
  One of my followers would not cast spells, Or interpret dreams, Nor
  would they practice astrology, Prognosticate animal sounds,
  https://www.dhammatalks.org/suttas/KN/StNp/StNp4_14.html