Busr bin Sa'id (may Allah have mercy on him) narrates from Sayyiduna Zayd bin Thabit (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) made a compartment of a mat in the mosque and prayed in it for some nights. People gathered. Then they did not hear his (peace and blessings be upon him) voice and thought that he (peace and blessings be upon him) had fallen asleep, so they began to clear their throats so that he (peace and blessings be upon him) would come out to them. He (peace and blessings be upon him) said: "I kept seeing your state, until I feared that it might be made obligatory upon you. Had it been made obligatory upon you, you would not have been able to perform it. O people! Pray at night in your homes, for the best prayer of a man is in his home, except the obligatory prayer."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5236