That is a word pertaining to the truth which a jinn snatches and whispers into his friend's ears as a hen does. Then, they mix it with more than a hundred lies

عن عائشة رضي الله عنها قالت: سَأَلَ أُنَاسٌ رَسُولَ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ عَنِ الْكُهَّانِ، فَقَالَ لَهُمْ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «لَيْسُوا بِشَيْءٍ» قَالُوا: يَا رَسُولَ اللهِ، فَإِنَّهُمْ يُحَدِّثُونَ أَحْيَانًا بِالشَّيْءِ يَكُونُ حَقًّا، فَقَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «تِلْكَ الْكَلِمَةُ مِنَ الْحَقِّ يَخْطَفُهَا الْجِنِّيُّ فَيَقُرُّهَا فِي أُذُنِ وَلِيِّهِ قَرَّ الدَّجَاجَةِ، فَيَخْلِطُونَ فِيهَا أَكْثَرَ مِنْ مِائَةِ كَذْبَةٍ».

‘Ā’ishah (may Allah be pleased with her) reported: Some people asked the Messenger of Allah (may Allah's peace and blessings be upon him) about diviners, and he said to them: "They are of no account." They said: "O Messenger of Allah, but they sometimes make true predictions." Thereupon, the Messenger of Allah (may Allah's peace and blessings be upon him) said: "That is a word pertaining to the truth which a jinn snatches and whispers into his friend's ears as a hen does. Then, they mix it with more than a hundred lies."

Source · Agreed upon

From the Hadith Encyclopedia (hadeethenc.com).