It is narrated from Hazrat Zaid bin Thabit (may Allah be pleased with him) that once the Holy Prophet (peace and blessings of Allah be upon him) said: Apart from the obligatory prayers, performing other prayers at home is the most virtuous for a person.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 21624