Musannaf Ibn Abi Shaybah 27668 — Asking permission to enter

Husayn said: Abu Malik al-Ghifari said: "When you enter a house in which there are polytheists, say: 'As-salamu alayna wa ala ibadillahis-salihin' (Peace be upon us and upon the righteous servants of Allah). They will think that you have greeted them, whereas you have turned the greeting away from them."