It is narrated from Hazrat Abu Umamah (may Allah be pleased with him) that I heard the sermon of the Prophet (peace and blessings be upon him) during the Farewell Pilgrimage. The Prophet (peace and blessings be upon him) was mounted on his camel, with his feet in the stirrups, which made him elevated, and he was saying: "Do you not hear?" Then the last person said, "What do you wish to say? (Your voice is reaching us and we are listening.)" The Prophet (peace and blessings be upon him) said: "Worship your Lord, perform the five daily prayers, fast for one month, pay the zakat of your wealth, obey your leader, and enter the Paradise of your Lord." The narrator asked Hazrat Umamah (may Allah be pleased with him) at what age he heard this hadith, and he replied: "When I was thirty years old."