Verse 19

وَكَذَٰلِكَ بَعَثْنَـٰهُمْ لِيَتَسَآءَلُوا۟ بَيْنَهُمْ قَالَ قَآئِلٌ مِّنْهُمْ كَمْ لَبِثْتُمْ قَالُوا۟ لَبِثْنَا يَوْمًا أَوْ بَعْضَ يَوْمٍ قَالُوا۟ رَبُّكُمْ أَعْلَمُ بِمَا لَبِثْتُمْ فَٱبْعَثُوٓا۟ أَحَدَكُم بِوَرِقِكُمْ هَـٰذِهِۦٓ إِلَى ٱلْمَدِينَةِ فَلْيَنظُرْ أَيُّهَآ أَزْكَىٰ طَعَامًا فَلْيَأْتِكُم بِرِزْقٍ مِّنْهُ وَلْيَتَلَطَّفْ وَلَا يُشْعِرَنَّ بِكُمْ أَحَدًا

And We thus resurrected them, they then debated amongst themselves. Their spokesman said; how long were you here? They said a day or part of a day. They said your Lord knows well how long you were here, therefore, send one of you to the town with this note, and find out who is having clean food, so you can bring some provision therefrom and be watchful that no one recognizes you.