They add one hundred lies to that (one word)

Narrated Aishah Radi Allaahu anha: The Prophet SalAllaahu alaihe wa sallam said, " While the angels talk amidst the clouds about things that are going to happen on earth, the devils hear a word of what they say and pour it into the ears of a foreteller as one pours something in a bottle, and they add one hundred lies to that (one word)." [Sahih Al-Bukhari # 3288]