(484) بَابُ إِذَا دَخَلَ بَيْتًا غَيْرَ مَسْكُونٍ
'Abdullah ibn 'Umar said, "When someone enters a house which isnot lived in, he should say, 'Peace be upon the righteous slaves of Allah.'"
Reference: Al-Adab Al-Mufrad 1055
In-book reference: Book 43, Hadith 5
English translation: Book 43, Hadith 1055