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abudawud:5189 – Mūsá b. Ismāʿīl > Ḥammād > Ḥabīb And Hishām > Muḥammad > Abū Hurayrah

The Prophet ﷺ said: A man's messenger sent to another indicates his permission to enter.  

أبو داود:٥١٨٩ – حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ حَدَّثَنَا حَمَّادٌ عَنْ حَبِيبٍ وَهِشَامٍ عَنْ مُحَمَّدٍ عَنْ أَبِي هُرَيْرَةَ

أَنَّ النَّبِيَّ ﷺ قَالَ رَسُولُ الرَّجُلِ إِلَى الرَّجُلِ إِذْنُهُ  

See similar narrations below:

Collected by Ibn Ḥibbān, Suyūṭī

ذِكْرُ الْإِبَاحَةِ لِلْمَرْءِ دُخُولَ بَيْتِ الدَّاعِي بِغَيْرِ إِذْنِهِ إِذَا كَانَ مَعَهُ رَسُولُهُ

ibnhibban:5811 – ʿAbdullāh b. Muḥammad al-Azdī > Isḥāq b. Ibrāhīm al-Ḥanẓalī > Sulaymān b. Ḥarb > Ḥammād b. Salamah > Ayyūb And Ḥabīb b. al-Shahīd > Muḥammad b. Sīrīn > Abū Hurayrah

[Machine] From the Messenger of Allah ﷺ , he said, "The messenger of a man is his permission to another man."  

ابن حبّان:٥٨١١ – أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ الْأَزْدِيُّ قَالَ حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ الْحَنْظَلِيُّ قَالَ حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ قَالَ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ أَيُّوبَ وَحَبِيبِ بْنِ الشَّهِيدِ عَنْ مُحَمَّدِ بْنِ سِيرِينَ عَنْ أَبِي هُرَيْرَةَ

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ «رَسُولُ الرَّجُلِ إِلَى الرَّجُلِ إِذْنُهُ»