On a festival day when I was present at the prayer along with the Prophet he first observed the prayer without adhan or iqama before the sermon. Then when he finished the prayer he stood up leaning on Bilal, praised and extolled God, gave the people an exhortation and an admonition and urged them to obey Him. He then went to the women, taking Bilal with him, commanded them to fear God and gave them an exhortation and an admonition.
Sa'id b. al-‘As said he asked Abu Musa and Hudhaifa how God’s Messenger said “God is most great” on the day of sacrifice and of the breaking of the fast. Abu Musa said he uttered it four times as he did at funerals and Hudhaifa said that that was correct.