Muwatta Malik 436
موطأ مالك#436SahihYahya related to me from Malik that Nafi, the mawla of Abdullah ibn Umar said, "I was at Adha and Fitr with Abu Hurayra and he said 'Allah is greater' seven times in the first raka, before the recitation, and five times in the second, before the recitation
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMauquf Sahih
In-book reference: 10:9