'Urwa reported on the authority of his father that 'A'isha said to him:
O, the son of my sister, the Muslims were commanded to seek forgiveness for the Companions of Allah's Apostle (ﷺ) but they reviled them.
Reference: Sahih Muslim 3022 a
In-book reference: Book 56, Hadith 17
USC-MSA web (English) reference(deprecated numbering scheme): Book 43, Hadith 7167