Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:6217Abū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās al-Aṣam > al-Rabīʿ > al-Shāfiʿī > Ibrāhīm b. Muḥammad > ʿAbd al-Raḥman b. Muḥammad b. ʿAbd > Ibrāhīm b. ʿAbdullāh > ʿUbaydullāh b. ʿAbdullāh b. ʿUtbah

[Machine] The Sunnah in the Takbir of Eid Al-Adha and Eid Al-Fitr on the pulpit before the sermon is that the Imam starts before the sermon while standing on the pulpit with nine consecutive takbirs, with no speech in between them. Then, he delivers the sermon, sits for a while, and then stands up for the second sermon, beginning it with seven consecutive takbirs, with no speech in between them. Then, he delivers the sermon.  

البيهقي:٦٢١٧وَأَخْبَرَنَا أَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو ثنا أَبُو الْعَبَّاسِ الْأَصَمُّ أنبأ الرَّبِيعُ أنبأ الشَّافِعِيُّ أنبأ إِبْرَاهِيمُ بْنُ مُحَمَّدٍ عَنْ عَبْدِ الرَّحْمَنِ بْنِ مُحَمَّدِ بْنِ عَبْدٍ عَنْ إِبْرَاهِيمَ بْنِ عَبْدِ اللهِ عَنْ عُبَيْدِ اللهِ بْنِ عَبْدِ اللهِ بْنِ عُتْبَةَ قَالَ

السُّنَّةُ فِي تَكْبِيرِ يَوْمِ الْأَضْحَى وَالْفِطْرِ عَلَى الْمِنْبَرِ قَبْلَ الْخُطْبَةِ أَنْ يَبْتَدِيَ الْإِمَامُ قَبْلَ الْخُطْبَةِ وَهُوَ قَائِمٌ عَلَى الْمِنْبَرِ بِتِسْعِ تَكْبِيرَاتٍ تَتْرَى لَا يَفْصِلُ بَيْنَهَا بِكَلَامٍ ثُمَّ يَخْطُبُ ثُمَّ يَجْلِسُ جِلْسَةً ثُمَّ يَقُومُ فِي الْخُطْبَةِ الثَّانِيَةِ فَيَفْتَتِحُهَا بِسَبْعِ تَكْبِيرَاتٍ تَتْرَى لَا يَفْصِلُ بَيْنَهَا بِكَلَامٍ ثُمَّ يَخْطُبُ