الاعراف — Al-A'raf Ayat 106

قَالَ اِنْ كُنْتَ جِئْتَ بِاٰيَةٍ فَأْتِ بِهَآ اِنْ كُنْتَ مِنَ الصّٰدِقِيْنَ

Qāla in kunta ji'ta bi'āyatin fa'ti bihā in kunta minaṣ ṣādiqīn(a).

"[Pharaoh] said, "If you have come with a sign, then bring it forth, if you should be of the truthful.""