Sayyiduna Abu Mas'ud al-Badri (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "The one who has read the most Qur'an and is earliest in migration should lead the people in prayer; if they are equal in recitation, then the one earliest in migration. If they are equal in migration, then the eldest. No one should lead another in prayer in his house or within his authority, nor sit on his place of honour without permission," or he said: "unless he gives him permission."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5318