21۞ وَاذكُر أَخا عادٍ إِذ أَنذَرَ قَومَهُ بِالأَحقافِ وَقَد خَلَتِ النُّذُرُ مِن بَينِ يَدَيهِ وَمِن خَلفِهِ أَلّا تَعبُدوا إِلَّا اللَّهَ إِنّي أَخافُ عَلَيكُم عَذابَ يَومٍ عَظيمٍShabbir AhmedAnd remember the brother of Aad when he warned his people in their Land of Sand-dunes. And, verily, Warners came and went before and after him, saying, "Serve none but Allah. Behold, I fear for you the retribution of a Tremendous Day."