Abu Iyas Mu'awiyah bin Qurrah (may Allah have mercy on him) said: I heard Abdullah bin Mughaffal (may Allah be pleased with him) say: I saw the Messenger of Allah (peace and blessings be upon him) riding his she-camel or his camel, and it was moving along, and he was reciting Surah al-Fath, or part of Surah al-Fath, gently and with tarji' (a repeated, vibrating voice).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2424