It was narrated from Abu Hurairah that:
The Prophet said: "When Allah decrees a matter in heaven, the angels beat their wings in submission to his decree (with a sound) like a chain beating a rock. Then "When fear is banished from their hearts, they say: 'What is it that your Lord has said?' They say: 'The truth. And He is The Most High, The Most Great." He said: 'Then the eavesdroppers (from among the jinn) listen out for that, one above the other, so (one of them) hears the words and passes it on to the one beneath him. The Shihab (shooting star) may strike him before he can pass it on to the one beneath him and the latter can pass it on to the soothsayer or sorcerer, or it may not strike him until he has passed it on. And he ads one hundred lies to it, and only that word which was overheard from the heavens is true."
English reference: Vol. 1, Book 1, Hadith 194
Arabic reference: Book 1, Hadith 199