((إذَا سَلَّمَ عَلَيْكُمْ أَهْلُ الْكِتَابِ فَقُولُوا: وَعَلَيْكُمْ)).

idhaa salama 'alaykum aahlu alkitaabi faquwluwa: wa'alaykum.

(When the people of the Book greet you, reply by saying: (And upon you.))