Sayyiduna Zayd bin Thabit (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) made a chamber and began to pray in it. The Companions came to know of it, and they too began to pray along with his (peace and blessings be upon him) prayer. The Messenger of Allah (peace and blessings be upon him) said: "The best prayer is the prayer a man offers in his own home, except for the obligatory prayer."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4877