Muwatta Malik Book 8, Hadith 4
Yahya related to me from Malik from Abu'n-Nadr, the mawla of Umar
ibn Ubaydullah from Yusr ibn Said that Zayd ibn Thabit said, "The most
excellent prayer is your prayer in your house, except for the
prescribed prayers."
Yahya related to me from Malik from Abu'zZinad from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "By Him in whose hand myself is! I had in mind to order firewood to be collected, then to order the prayer to be called, and to appoint a man to lead the people in prayer, and then to come up behind certain men and burn their houses down about them! By Him in whose hand myself is! If one of them knew that he would find a meaty bone or two good legs of meat, he would be present at isha.''
Yahya related to me from Malik from Abd ar-Rahman ibn Harmala al- Aslami from Said ibn al-Musayyab that the Messenger of Allah, may Allah bless him and grant him peace, said, "What separates us from the hypocrites is being present at isha and subh. They cannot do it," or words to that effect.