(8) باب فَضَائِلِ الْحَسَنِ وَالْحُسَيْنِ رضى الله عنهما
Iyas reported on the authority of his father:
I (had the honour of) leading the white mule on which rode Allah's Apostle (ﷺ) and with him were Hasan and Husain, till it reached the apartment of Allah's Apostle (ﷺ). The one amongst them was seated before him and the other one was seated behind him.
Reference: Sahih Muslim 2423
In-book reference: Book 44, Hadith 90
USC-MSA web (English) reference(deprecated numbering scheme): Book 31, Hadith 5954