Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) said: I came to Madinah concerning the ransom of the captives of Badr, and at that time I was a polytheist. I entered the mosque while he (peace and blessings be upon him) was leading the Maghrib prayer, and in it he (peace and blessings be upon him) recited Surah al-Tur, and it was as if my heart were being split apart by the recitation of the Qur'an.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4333