«دَا وَجْهَكْ وَالَّا ضَيِّ الْقَمَرْ»

Faced with someone who has turned up unexpectedly, the speaker feigns disbelief, asking whether the brightness in front of them is a familiar face or moonlight. The question is rhetorical: the mock confusion conveys delighted astonishment at the sudden arrival, not real doubt about who has come.

The line also works as a heartfelt welcome. Comparing the newcomer to the moon's glow is warm praise within a greeting rather than a romantic declaration or flirtation, and it tells the guest plainly that their coming is a joy. An ordinary arrival becomes a small occasion for warmth.

Say it at the moment someone appears without warning and you want to greet them warmly, such as opening the door to a friend or relative whose unexpected visit is a pleasant surprise. It is a welcome, not a general remark on someone's looks.