(Al-Addariyath) 51 : 25
إِذْ دَخَلُوا عَلَيْهِ فَقَالُوا سَلَامًا ۖ قَالَ سَلَامٌ قَوْمٌ مُنْكَرُونَ
When they entered to him, then they said: "Peace!" He said: "Peace, a people of strangers."
See explanation 15: 52.