The word(s) "ويلك" appears in 3 verse(s) in Quran.

(1) قَالَ لَهُم مُّوسَىٰ وَيْلَكُمْ لَا تَفْتَرُوا عَلَى اللَّهِ كَذِبًا فَيُسْحِتَكُم بِعَذَابٍ ۖ وَقَدْ خَابَ مَنِ افْتَرَىٰ

(سورة طه, Taa-Haa, Chapter #20, Verse #61)
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(2) وَقَالَ الَّذِينَ أُوتُوا الْعِلْمَ وَيْلَكُمْ ثَوَابُ اللَّهِ خَيْرٌ لِّمَنْ آمَنَ وَعَمِلَ صَالِحًا وَلَا يُلَقَّاهَا إِلَّا الصَّابِرُونَ

(سورة القصص, Al-Qasas, Chapter #28, Verse #80)
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(3) وَالَّذِي قَالَ لِوَالِدَيْهِ أُفٍّ لَّكُمَا أَتَعِدَانِنِي أَنْ أُخْرَجَ وَقَدْ خَلَتِ الْقُرُونُ مِن قَبْلِي وَهُمَا يَسْتَغِيثَانِ اللَّهَ وَيْلَكَ آمِنْ إِنَّ وَعْدَ اللَّهِ حَقٌّ فَيَقُولُ مَا هَـٰذَا إِلَّا أَسَاطِيرُ الْأَوَّلِينَ

(سورة الأحقاف, Al-Ahqaf, Chapter #46, Verse #17)
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