Hekayat 79 from Chapter 8 of Golestan of Saadi

Do not rush to ask about something you know will become clear in time, as it diminishes the majesty of authority.

When Luqman saw that in the hands of David,

Iron, through a miracle, was turned into wax,

He did not ask what he was making, knowing

That without asking, it would become clear.

هر آنچه دانی که هر آینه معلوم تو گردد، به پرسیدن آن تعجیل مکن که هیبت سلطنت را زیان دارد.

چو لقمان دید کاندر دست داوود

همی آهن به معجز موم گردد

نپرسیدش چه می‌سازی که دانست

که بی پرسیدنش معلوم گردد