وَعَنْ جَعْفَرِ بْنِ مُحَمَّدٍ مُرْسَلًا أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَأَبَا بَكْرٍ وَعُمَرَ كَبَّرُوا فِي الْعِيدَيْنِ وَالِاسْتِسْقَاءِ سَبْعًا وَخَمْسًا وَصَلَّوْا قبل الْخطْبَة وجهروا بِالْقِرَاءَةِ. رَوَاهُ الشَّافِعِي
Ja'far b. Muhammad told in mursal form that the Prophet, Abu Bakr and ‘Umar said “God is most great” at the two festivals and when praying for rain seven times in the first rak'a and five times in the second. They prayed before the sermon, and recited the Qur’an in a loud voice. Shafi‘i transmitted it.
Source: Mishkat al-Masabih — repository translation · Al-Khatib Al-Tabrizi — authenticity/grade metadata requires independent source review · Sunnah.comAudio not available for the selected reciter.
Source: Mishkat al-Masabih — repository arabic · Al-Khatib Al-Tabrizi · Sunnah.com