(Al-Kahf) 18 : 70
قَالَ فَإِنِ اتَّبَعْتَنِي فَلَا تَسْأَلْنِي عَنْ شَيْءٍ حَتَّىٰ أُحْدِثَ لَكَ مِنْهُ ذِكْرًا
He said: "Then if you are following me, you don’t ask me about anything until I inform you about It".