It is narrated from Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) that he came to Madinah concerning the ransom (of prisoners), and he was at that time a polytheist. He entered the mosque while the Messenger of Allah (peace and blessings be upon him) was praying Maghrib, and he (peace and blessings be upon him) recited Surah al-Tur. It was as if the recitation of the Qur'an split my heart.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1582