Musannaf Ibn Abi Shaybah

Hasan says that when a person recites {إِنَّ اللَّہَ وَمَلاَئِکَتَہُ یُصَلُّونَ عَلَی النَّبِیِّ ، یَا أَیُّہَا الَّذِینَ آمَنُوا صَلُّوا عَلَیْہِ وَسَلِّمُوا تَسْلِیمَا } in prayer, he should also send blessings upon the Prophet (peace and blessings of Allah be upon him). Ibn Sirin says that during the recitation of the Holy Qur'an, no other speech should be inserted; rather, the recitation of the Qur'an should be continued exactly as it is.