Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Whoever teaches a servant one verse of the Book of Allah becomes his master (mawla); it is then not fitting for him to forsake him or to wrong him."
Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains a narrator, Ubayd bin Razin al-Ladhiqi, and I have not seen anyone who mentions him.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 535
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الامام المطبراني فى معجمه الكبير 7528 ، أخرجه المعجم الكبير للطبراني برقم: 7528»