The Messenger of Allah ﷺ said, "By Him in whose hand is Muhammad's soul, no one of this community, no Jew and no Christian, hears of me and then dies without believing in what I was sent with, except that he will be among the people of the Fire."
وقال رسول الله ﷺ والذي نفس محمد بيده لا يسمع بي أحد من هذه الأمة ولا يهودي ولا نصراني ومات ولم يؤمن بالذي أرسلت به إلا كان من أصحاب النار
It is also sahih, and it is in the individual Sahifah, number 90. Bukhari did not narrate it at all, as far as my research has reached. Muslim did not narrate it through the route of the Sahifah, but rather he narrated it, 1:53-54 Bulaq edition, through the narration of Abu Yunus, from Abu Hurairah.