Hadith: When one mentions Allah's name upon entering his house and upon eating, the devil says (to his companions): 'There is no night shelter nor supper here for you

عَنْ جَابِرِ بْنِ عَبْدِ اللهِ رضي الله عنهما أَنَّهُ سَمِعَ النَّبِيَّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ يَقُولُ:
«إِذَا دَخَلَ الرَّجُلُ بَيْتَهُ، فَذَكَرَ اللهَ عِنْدَ دُخُولِهِ وَعِنْدَ طَعَامِهِ، قَالَ الشَّيْطَانُ: لَا مَبِيتَ لَكُمْ، وَلَا عَشَاءَ، وَإِذَا دَخَلَ، فَلَمْ يَذْكُرِ اللهَ عِنْدَ دُخُولِهِ، قَالَ الشَّيْطَانُ: أَدْرَكْتُمُ الْمَبِيتَ، وَإِذَا لَمْ يَذْكُرِ اللهَ عِنْدَ طَعَامِهِ، قَالَ: أَدْرَكْتُمُ الْمَبِيتَ وَالْعَشَاءَ».
[صحيح] - [رواه مسلم] - [صحيح مسلم: 2018]

Jābir ibn ‘Abdullah (may Allah be pleased with him and his father) reported that he heard the Prophet (may Allah's peace and blessings be upon him) say:
"When one mentions Allah's name upon entering his house and upon eating, the devil says (to his companions): 'There is no night shelter nor supper here for you.' However, when one does not mention Allah's name upon entering his house, the devil says: 'You have found yourselves a night shelter.' If one does not mention Allah's name when starting to eat, the devil says: 'You have found yourselves both a night shelter and supper.'"
[Authentic hadith] - [Narrated by Muslim] - [Sahih Muslim - 2018]

Explanation

The Prophet (may Allah's peace and blessings be upon him) commands us to mention Allah upon entering the house and before eating. When one mentions Allah saying: "Bismillāh" (in the Name of Allah) upon entering his house and before eating, the devil says to his companions: You shall not have a night shelter or supper in this house whose owner has sought protection against you by mentioning Allah Almighty. However, if one enters his house without mentioning Allah upon entering and before eating, the devil informs his companions that they will have a night shelter and supper in this house.