Narrated `Abdullah bin `Umar:
We used not to call Zaid bin Haritha the freed slave of Allah's Messenger (ﷺ) except Zaid bin Muhammad till the Qu'anic Verse was revealed: "Call them (adopted sons) by (the names of) their fathers. That is more than just in the Sight of Allah." (33.5)
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 305
Arabic reference: Book 65, Hadith 4782