So turn away
they will know.
Fasfah 'anhum wa qul salaam; fasawfa ya'lamoon
So turn aside from them and say, "Peace." But they are going to know.
1 Mufti Taqi Usmani
So, turn away from them, and say, “Salām !” (good-bye!). Then, soon they will come to know (the end of their attitude).