18:70
قَالَ فَإِنِ ٱتَّبَعْتَنِى فَلَا تَسْـَٔلْنِى عَن شَىْءٍ حَتَّىٰٓ أُحْدِثَ لَكَ مِنْهُ ذِكْرًا
qāla fa-ini ittabaʿtanī falā tasalnī ʿan shayin ḥattā uḥ'ditha laka min'hu dhik'ran
He said, "Then if you follow me, do not ask me about anything until I make to you about it mention [i.e., explanation]."
— Saheeh International
The man said, ‘If you follow me then, do not query anything I do before I mention it to you myself.’
— M. A. S. Abdel Haleem
He (Khidr) said: "Then, if you follow me, ask me not about anything till I myself mention of it to you."
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali