authenticity of the narrative .. when Abu Bakar R.A accepted Islam, by the end of the day, he brought six people (including Osman R.A and others) to Rasullah sayin these are his days earnings

As Salaualaikum W.r.w.b. May Allah s.w.t accept all your efforts in answering and replying to the questions concerning the deen. My question is regarding the authenticity of the narrative we frequently hear in the tablighee bayans .. that is, when Abu Bakar R.A accepted Islam, by the end of the day, he (Abu Bakar R.A) brought six people (including Osman R.A and others in Ashr-e-Mubeshara) to Rasullah s.W.s stating that these are his days earnings. Please share the Hadith/Incedent which forms the basis for this narrative. May Allah s.w.t forgive me of my mistakes. Jazakallah Khair. Brother in Isalm.