Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 2070
This hadith has been narrated by Qatada with the same chain of transmitters. And in the hadith transmitted by Sa'id and Hisham, (the words are):" The Apostle of Allah (may peace be upon him) was asked about qirat, and he said: It is equivalent to Uhud."