Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:86:4 –

There is no soul but that it has over it a protector.  

Over every soul there is a keeper (if read la-mā, then mā is extra, and in, is softened in place of the hardened form with its subject omitted, that is to say, innahu; the lām is ˹a particle˺ for separation; if read lammā, then in is for negation and lammā means illā, ‘except that’) — the watcher is an angel that keeps a record of its deeds, both the good and the evil.
القرآن:٨٦:٤ –

إِنْ كُلُّ نَفْسٍ لَمَّا عَلَيْهَا حَافِظٌ  

{إن كل نفس لمَا عليها حافظ} بتخفيف ما فهي مزيدة وإن مخففة من الثقيلة واسمها محذوف، أي إنه واللام فارقة وبتشديدها فإن نافية ولما بمعنى إلا والحافظ من الملائكة يحفظ عملها من خير وشر.