18:19
وَ كَ ذَٰلِكَ بَعَثْ نَٰ هُمْ لِ يَتَسَآءَلُ وا۟ بَيْنَ هُمْ قَالَ قَآئِلٌ مِّنْ هُمْ كَمْ لَبِثْ تُمْ قَالُ وا۟ لَبِثْ نَا يَوْمًا أَوْ بَعْضَ يَوْمٍ قَالُ وا۟ رَبُّ كُمْ أَعْلَمُ بِ مَا لَبِثْ تُمْ فَ ٱبْعَثُ وٓا۟ أَحَدَ كُم بِ وَرِقِ كُمْ هَٰذِهِۦٓ إِلَى ٱلْ مَدِينَةِ فَ لْ يَنظُرْ أَيُّهَآ أَزْكَىٰ طَعَامًا فَ لْ يَأْتِ كُم بِ رِزْقٍ مِّنْ هُ وَ لْ يَتَلَطَّفْ وَ لَا يُشْعِرَ نَّ بِ كُمْ أَحَدًا
And similarly, We awakened them that they might question one another. Said a speaker from among them, "How long have you remained [here]?" They said, "We have remained a day or part of a day." They said, "Your Lord is most knowing of how long you remained. So send one of you with this silver coin of yours to the city and let him look to which is the best of food and bring you provision from it and let him be cautious. And let no one be aware of you.
6:109
وَ أَقْسَمُ وا۟ بِ ٱللَّهِ جَهْدَ أَيْمَٰنِ هِمْ لَ ئِن جَآءَتْ هُمْ ءَايَةٌ لَّ يُؤْمِنُ نَّ بِ هَا قُلْ إِنَّ مَا ٱلْ ءَايَٰتُ عِندَ ٱللَّهِ وَ مَا يُشْعِرُ كُمْ أَنَّ هَآ إِذَا جَآءَتْ لَا يُؤْمِنُ ونَ
And they swear by Allah their strongest oaths that if a sign came to them, they would surely believe in it. Say, "The signs are only with Allah." And what will make you perceive that even if a sign came, they would not believe.