Abdur Rahman ibn Awf reported: He would patrol the city at night with Umar ibn al-Khattab, may Allah be pleased with him, and on one occasion they were walking when the lamp of a household caught their attention. They approached it until they heard loud voices inside the door. Umar grabbed the hand of Abdur Rahman and he said, “Do you know whose house this is?” He said no. Umar said, “This is the house of Rabi’ah ibn Umayyah ibn Khalaf, and they are inside drinking wine right now! What do you think?” Abdur Rahman said, “Indeed, I think we have done what Allah has prohibited for us. Allah Almighty said, ‘Do not spy,’ (49:12) and we have spied on them.” Umar turned away and he left them alone.
Source: al-Mustadrak 8198
Grade: Sahih (authentic) according to Al-Dhahabi
عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ أَنَّهُ حَرَسَ لَيْلَةً مَعَ عُمَرَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ بِالْمَدِينَةِ فَبَيْنَمَا هُمْ يَمْشُونَ شَبَّ لَهُمْ سِرَاجٌ فِي بَيْتٍ فَانْطَلَقُوا يَؤُمُّونَهُ حَتَّى إِذَا دَنَوْا مِنْهُ إِذَا بَابٌ مُجَافٌ عَلَى قَوْمٍ لَهُمْ فِيهِ أَصْوَاتٌ مُرْتَفِعَةٌ فَقَالَ عُمَرُ رَضِيَ اللَّهُ عَنْهُ وَأَخَذَ بِيَدِ عَبْدِ الرَّحْمَنِ أَتَدْرِي بَيْتُ مَنْ هَذَا قَالَ لَا قَالَ هَذَا بَيْتُ رَبِيعَةَ بْنِ أُمَيَّةَ بْنِ خَلَفٍ وَهُمُ الْآنَ شَرْبٌ فَمَا تَرَى فَقَالَ عَبْدُ الرَّحْمَنِ أَرَى قَدْ أَتَيْنَا مَا نَهَى اللَّهُ عَنْهُ نَهَانَا اللَّهُ عَزَّ وَجَلَّ فَقَالَ وَلَا تَجَسَّسُوا فَقَدْ تَجَسَّسْنَا فَانْصَرَفَ عُمَرُ عَنْهُمْ وَتَرَكَهُمْ
8198 المستدرك على الصحيحين كتاب الحدود النهي عن التجسس
7/3482 المحدث الذهبي خلاصة حكم المحدث إسناده صحيح في المهذب