Abu Yahya Sulaym bin Amir (may Allah have mercy on him) said: I heard Sayyiduna Abu Umamah (may Allah be pleased with him) say that during the Farewell Hajj the Messenger of Allah (peace and blessings be upon him) was riding his she-camel al-Jad'a'. He (peace and blessings be upon him) had put his feet in the stirrups and was raising himself up to make the people hear, and he was saying: "Do you not hear?" raising his voice. A man from one of the groups of people said: "What do you enjoin upon us?" The Messenger of Allah (peace and blessings be upon him) said: "Worship your Lord, pray your five (prayers), fast your month, pay the zakah of your wealth, and obey those in authority over you; you will enter the Paradise of your Lord." Abu Yahya said: I said: "O Abu Umamah, about how old were you that day?" He said: "I was a young man of thirty, jostling the camels, until I made my way step by step close to the Messenger of Allah (peace and blessings be upon him)."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7633