And similarly, We awakened them that they might question one another. Said (18:19)

﴿وَكَذَٰلِكَ بَعَثْنَاهُمْ لِيَتَسَاءَلُوا بَيْنَهُمْ ۚ قَالَ قَائِلٌ مِّنْهُمْ كَمْ لَبِثْتُمْ ۖ قَالُوا لَبِثْنَا يَوْمًا أَوْ بَعْضَ يَوْمٍ ۚ قَالُوا رَبُّكُمْ أَعْلَمُ بِمَا لَبِثْتُمْ فَابْعَثُوا أَحَدَكُم بِوَرِقِكُمْ هَٰذِهِ إِلَى الْمَدِينَةِ فَلْيَنظُرْ أَيُّهَا أَزْكَىٰ طَعَامًا فَلْيَأْتِكُم بِرِزْقٍ مِّنْهُ وَلْيَتَلَطَّفْ وَلَا يُشْعِرَنَّ بِكُمْ أَحَدًا﴾
[ الكهف: 19]

18:19 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.

Just as I did to them the wondrous acts that I have mentioned, I awakened them after a long period of time and they began to ask one another about the period that they had spent asleep.
One of them responded: I remained asleep for one day or part of one day.
One of them, to whom it was not clear how long they had spent asleep, responded: Your Lord knows best about the period you had remained asleep, so entrust the knowledge of that to Him and get busy with what concerns you.
Send one of you with these silver coins to the city we know and let him see which of the inhabitants of that city are most pure in their food and earnings.
He should proceed with caution when entering and leaving and when dealing.
He must also be tactful and not let anyone find out where you are, because that will result in great harm.

Likewise, We awakened them (from their long deep sleep) that they might question one another. A speaker from among them said: "How long have you stayed (here)?" They said: "We have stayed (perhaps) a day or part of a day." They said: "Your Lord (Alone) knows best how long you have stayed (here). So send one of you with this silver coin of yours to the town, and let him find out which is the good lawful food, and bring some of that to you. And let him be careful and let no man know of you.

phonetic Transliteration

Wakathalika baAAathnahum liyatasaaloo baynahum qala qailun minhum kam labithtum qaloo labithna yawman aw baAAda yawmin qaloo rabbukum aAAlamu bima labithtum faibAAathoo ahadakum biwariqikum hathihi ila almadeenati falyanthur ayyuha azka taAAaman falyatikum birizqin minhu walyatalattaf wala yushAAiranna bikum ahadan

Abdullah Yusuf Ali - Translation

Such (being their state), we raised them up (from sleep), that they might question each other. Said one of them, "How long have ye stayed (here)?" They said, "We have stayed (perhaps) a day, or part of a day." (At length) they (all) said, "Allah (alone) knows best how long ye have stayed here.... Now send ye then one of you with this money of yours to the town: let him find out which is the best food (to be had) and bring some to you, that (ye may) satisfy your hunger therewith: And let him behave with care and courtesy, and let him not inform any one about you.

Safi-ur-Rahman al-Mubarakpuri

Likewise, We woke them that they might question one another. A speaker among them said: "How long have you stayed (here)" They said: "We have stayed a day or part of a day." They said: "Your Lord knows best how long you have stayed (here). So send one of you with this silver coin of yours to the town, and let him find out which is the Azka food, and bring some of that to you. And let him be careful and let no man know of you."

Page 295 English transliteration