The Prophet ﷺ said, "Every prophet has a companion, and my companion," meaning in Paradise, "is Uthman."
حدثنا أبو هشام الرفاعي حدثنا يحيى بن اليمان عن شيخ من بني زهرة عن الحارث بن عبد الرحمن بن أبي ذباب
قال النبي ﷺ لكل نبي رفيق ورفيقي يعني في الجنة عثمان
Its isnad is daif. Abu Yaala narrated it, no. 665, from Abu Hisham Rafai with the same chain.There is a shaikh whom I could not identify, and Harith bin Abdul-Rahman did not meet Talha (see Tuhfat Ashraf, 4/212). It has a daif corroborating narration in Ibn Majah, no. 109, and elsewhere.