ADHIKR

(Al-Ahraf) 7 : 106
قَالَ إِنْ كُنْتَ جِئْتَ بِآيَةٍ فَأْتِ بِهَا إِنْ كُنْتَ مِنَ الصَّادِقِينَ

He said: "If you have come with any Sign, then you produce It if you are among the truthful".