Hurayrah are unsound.
Shaykh al-Albānī comments: “Taken as a whole, the hadith is authentic through these various routes, and the Companions’ practice substantiates it.”
Points derived from the hadith
1 – It is recommended to pronounce the takbir in the two ʿEid prayers by saying “Allāhu akbar,” in obedience to the verse, “…so that you may magnify Allah for having guided you” (al-Baqarah 2:185).
2 – Their number is six takbirs in the first rakʿah, apart from the opening takbīrat al-iḥrām, and five in the second rakʿah, apart from the takbir said when rising from prostration. Al-Bukhārī said, “Nothing in this chapter is sounder than this report.” Ibn ʿAbd al-Barr added, “Numerous fair-grade chains state that the Prophet ﷺ said seven takbirs in the first rakʿah and six in the second; no contrary report from him exists, and this is therefore the practice that merits adoption.”
3 – The extra takbirs occur in the first rakʿah after the opening takbir and the opening supplication, and in the second rakʿah after the takbir uttered when rising from prostration.
4 – After the seventh takbir one seeks refuge (taʿawwudh), then recites al-Fātiḥah followed by another surah. Nothing is inserted between the seventh takbir and the taʿawwudh, for the taʿawwudh belongs to the recitation.
5 – He should raise his hands with every takbir, as Wāʾil ibn Ḥujr reported: “The Messenger of Allah ﷺ raised his hands with every takbir.” This is the view of the majority of scholars, including the Imams Abū Ḥanīfah and al-Shāfiʿī, and one narration from Mālik.
6 – Between every two takbirs he may say: “Allāhu akbar kabīran, wa-l-ḥamdu lillāhi kathīran, wa-subḥāna-llāhi bukratan wa-aṣīlā, wa ṣallā-llāhu ʿalā Muḥammad wa ālihi wa sallama taslīman kathīran.” This was the preference of al-Shāfiʿī and others.
7 – Shaykh al-Islām (Ibn Taymiyyah) said: “Nothing specific has been prescribed here; it is therefore recommended that words of remembrance be interspersed.” Ibn al-Qayyim stated: “The Prophet ﷺ would pause briefly between each pair of takbirs, and nothing definite has been preserved….”