Sunan Abi Dawud 5189
سنن أبي داود#5189Sahihحَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، عَنْ حَبِيبٍ، وَهِشَامٍ، عَنْ مُحَمَّدٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " رَسُولُ الرَّجُلِ إِلَى الرَّجُلِ إِذْنُهُ " .
Narrated AbuHurayrah: The Prophet (ﷺ) said: A man's messenger sent to another indicates his permission to enter
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih
In-book reference: 43:417