Abu Huraira reported that a person came to Allah's Messenger (ﷺ) and said:

I am hard pressed by hunger. He sent (message) to one of his wives (to procure food for him). but she said: By Him Who has sent you with Truth, thrre is nothing with me (to serve him) but only water. He (the Prophet) then sent the (same) message to another, and she gave the same reply, until all of them gave the same reply: By Him Who has sent you with the Truth, there is nothing with me but only water, whereupon he (the Prophet) said: Allah would show mercy to him who will entertain this guest tonight. A person from the Ansar stood up and said: Messenger of Allah, I (am ready to entertain). He took him to his house and said to his wife: Is there anything with you (to serve the gdest)? She said: No, but only a subsistence for our children. He said: Distract their attention with something, and when the guest enters extinguish the lamp and give him the impression that we are eating. So they sat down. and the guest had his meal. When it was morning he went to Allah's Messenger (ﷺ) who said: Allah was well pleased with what you both did for your guest this night.

حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا جَرِيرُ بْنُ عَبْدِ الْحَمِيدِ، عَنْ فُضَيْلِ بْنِ غَزْوَانَ، عَنْ أَبِي حَازِمٍ الأَشْجَعِيِّ، عَنْ أَبِي هُرَيْرَةَ، قَالَ جَاءَ رَجُلٌ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ إِنِّي مَجْهُودٌ ‏.‏ فَأَرْسَلَ إِلَى بَعْضِ نِسَائِهِ فَقَالَتْ وَالَّذِي بَعَثَكَ بِالْحَقِّ مَا عِنْدِي إِلاَّ مَاءٌ ‏.‏ ثُمَّ أَرْسَلَ إِلَى أُخْرَى فَقَالَتْ مِثْلَ ذَلِكَ حَتَّى قُلْنَ كُلُّهُنَّ مِثْلَ ذَلِكَ لاَ وَالَّذِي بَعَثَكَ بِالْحَقِّ مَا عِنْدِي إِلاَّ مَاءٌ ‏.‏ فَقَالَ ‏"‏ مَنْ يُضِيفُ هَذَا اللَّيْلَةَ رَحِمَهُ اللَّهُ ‏"‏ ‏.‏ فَقَامَ رَجُلٌ مِنَ الأَنْصَارِ فَقَالَ أَنَا يَا رَسُولَ اللَّهِ ‏.‏ فَانْطَلَقَ بِهِ إِلَى رَحْلِهِ فَقَالَ لاِمْرَأَتِهِ هَلْ عِنْدَكِ شَىْءٌ ‏.‏ قَالَتْ لاَ إِلاَّ قُوتُ صِبْيَانِي ‏.‏ قَالَ فَعَلِّلِيهِمْ بِشَىْءٍ فَإِذَا دَخَلَ ضَيْفُنَا فَأَطْفِئِي السِّرَاجَ وَأَرِيهِ أَنَّا نَأْكُلُ فَإِذَا أَهْوَى لِيَأْكُلَ فَقُومِي إِلَى السِّرَاجِ حَتَّى تُطْفِئِيهِ ‏.‏ قَالَ فَقَعَدُوا وَأَكَلَ الضَّيْفُ ‏.‏ فَلَمَّا أَصْبَحَ غَدَا عَلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ ‏"‏ قَدْ عَجِبَ اللَّهُ مِنْ صَنِيعِكُمَا بِضَيْفِكُمَا اللَّيْلَةَ ‏"‏ ‏.‏