Sahih Muslim Book 4, Hadith Number 1800.

Chapter : Reciting the Qur’an leisurely and distinctively and abstaining from reciting it too hurriedly, and permission to recite two suras of more than two in a Rak’ah.

Ibrahim reported: ‘Alqama came to Syria and entered the mosque and prayed there and then went to a (place where people were sitting in a) circle and he sat therein. Then a person came there and I perceived that the people were annoyed and perturbed (on this arrival) and he sat on my side and then said: Do you remember how ‘Abdullah used to recite (the Qur’an)? And then the rest of the Hadith was narrated.