Musnad Ahmad 1012:106

Muhammad ibn Kathir al-Qassab al-Basri narrated to us, from Yunus ibn Ubayd, from Muhammad ibn Sirin, from Ubadah ibn al-Samit, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The house is a sanctuary, so whoever enters upon you in your sanctuary, kill him."