Amir bin Sa'd (may Allah have mercy on him) says: I was sitting in Makkah, and a fragrant-smelling man was praying at the Maqam (of Ibrahim), and a man was sitting behind him prompting him. It was Sayyiduna Uthman (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5786