Nafi' bin Sarjis (may Allah have mercy on him) narrates from Sayyiduna Abu Waqid al-Laythi (may Allah be pleased with him): "When the Messenger of Allah (peace and blessings be upon him) led the people in prayer, his prayer was the lightest of all people's, and in his own personal prayer he was the most constant of all."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3301