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
suyuti:22319a –
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السيوطي:٢٢٣١٩a –

"مَنْ عَلَّمَ عَبْدًا آيَةً مِنْ كتَابِ اللهِ فَهُوَ مَوْلاهُ، لا يَنْبَغِي لَهُ أَنْ يَخْذُلَهُ، وَلا يَسْتَأثِر عَلَيهِ، فَإِنْ هُوَ فَعَلَ قَصَمَ عُرْوَةً مِنْ عُرَى الإِسْلامِ".  

[عد] ابن عدى في الكامل [طب] الطبرانى في الكبير وابن مردويه، [هب] البيهقى في شعب الإيمان وابن النجار عن أَبي أُمامة

See similar narrations below:

Collected by Ṭabarānī
tabarani:7528 – Abū ʿAqīl Anas b. Salm al-Khawlānī > ʿUbayd b. Razīn al-Lādhiqī > Ismāʿīl b. ʿAyyāsh > Muḥammad b. Ziyād al-Alhānī > Abū Umāmah > Rasūl Allāh Ṣallá

[Machine] The Messenger of Allah ﷺ said, "Whoever teaches a servant a verse from the book of Allah, then he is his guardian and it is not right for him to abandon him or to take advantage of him."  

الطبراني:٧٥٢٨ – حَدَّثَنَا أَبُو عَقِيلٍ أَنَسُ بْنُ سَلْمٍ الْخَوْلَانِيُّ ثنا عُبَيْدُ بْنُ رَزِينٍ اللَّاذِقِيُّ قَالَ سَمِعْتُ إِسْمَاعِيلَ بْنَ عَيَّاشٍ يَقُولُ حَدَّثَنِي مُحَمَّدُ بْنُ زِيَادٍ الْأَلْهَانِيُّ عَنْ أَبِي أُمَامَةَ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «مَنْ عَلَّمَ عَبْدًا آيَةً مِنْ كِتَابِ اللهِ فَهُوَ مَوْلَاهُ لَا يَنْبَغِي لَهُ أَنْ يَخْذُلَهُ وَلَا يَسْتَأْثِرَ عَلَيْهِ»