Hadithcore
Riyad as-Salihin, 1165

Abu Hurairah (May Allah be pleased with him) reported:

The Messenger of Allah (ﷺ) said, "When any one of you sleeps, Satan ties three knots at the back of his neck. He recites this incantation at every knot: 'You have a long night, so sleep.' If he awakes and remembers Allah, one knot is loosened. If he performs Wudu', the (second) knot is loosened; and if he performs prayer, (all) knots are loosened. He begins his morning in a happy and refreshed mood; otherwise, he gets up in bad spirits and sluggish state." <b>[Al-Bukhari and Muslim]</b>.

وعن أبي هريرة رضي الله عنه، أن رسول الله صلى الله عليه وسلم ، قال‏:‏ ‏

‏يعقد الشيطان على قافية، رأس أحدكم، إذا هو نام، ثلاث عقد، يضرب على كل عقدة‏:‏ عليك ليل طويل فارقد، فإن استيقظ أحدكم، فذكر الله تعالى انحلت عقدة، فإن توضأ انحلت عقدة، فإن صلى انحلت عقدة، فأصبح نشيطًا طيب النفس، وإلا أصبح خبيث النفس كسلان‏

‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏ ‏.‏

References1 variant
In-Book Reference
Book 8, Hadith 175
Sharh · explanationclick to expand
<b>Guidance from the Hadiths:</b><br> 1) We should completely believe in everything the Prophet (may Allah’s peace and blessings be upon him) informed us about, like his statement “Satan urinated”, as believers are required to believe in information related to the unseen even if they do not grasp its reality.<br> 2) Qiyām al-Layl shields the one who performs it from Satan’s dominance over him.<br> 3) Remembering Allah, ablution, and prayer are the most effective means for getting rid of the knots made by Satan. These are quite easy to do, with help and guidance from Allah.<br> 4) Worship and activeness lead to relief of the heart, unlike sins and lethargy, which cause unease.
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