يا أَيُّهَا الَّذينَ آمَنوا إِذا ضَرَبتُم في سَبيلِ اللَّهِ فَتَبَيَّنوا وَلا تَقولوا لِمَن أَلقىٰ إِلَيكُمُ السَّلامَ لَستَ مُؤمِنًا تَبتَغونَ عَرَضَ الحَياةِ الدُّنيا فَعِندَ اللَّهِ مَغانِمُ كَثيرَةٌ ۚ كَذٰلِكَ كُنتُم مِن قَبلُ فَمَنَّ اللَّهُ عَلَيكُم فَتَبَيَّنوا ۚ إِنَّ اللَّهَ كانَ بِما تَعمَلونَ خَبيرًا

O you who believe, when you set out in the cause of God, be discerning. And don’t say to one who greets you with peace, “You are not a believer,” pursuing the perishable goods of worldly life. You were like them before, until God bestowed His favor upon you. So, be discerning; God is always aware of what you do.