Jami` at-Tirmidhi 830
جامع الترمذي#830Sahihحَدَّثَنَا عَبْدُ اللَّهِ بْنُ أَبِي زِيَادٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يَعْقُوبَ الْمَدَنِيُّ، عَنِ ابْنِ أَبِي الزِّنَادِ، عَنْ أَبِيهِ، عَنْ خَارِجَةَ بْنِ زَيْدِ بْنِ ثَابِتٍ، عَنْ أَبِيهِ، أَنَّهُ رَأَى النَّبِيَّ صلى الله عليه وسلم تَجَرَّدَ لإِهْلاَلِهِ وَاغْتَسَلَ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ . وَقَدِ اسْتَحَبَّ قَوْمٌ مِنْ أَهْلِ الْعِلْمِ الاِغْتِسَالَ عِنْدَ الإِحْرَامِ وَبِهِ يَقُولُ الشَّافِعِيُّ .
Zaid bin Thabit narrated from his father :who said that he saw the Prophet disrobing for his Ihlal and to perform Ghusl
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:
In-book reference: 9:23