We were with the Messenger of Allah ﷺ at the hills of Yemen when Bilal stood up to make the call to prayer. When he finished, the Messenger of Allah ﷺ said, "Whoever says with certainty the like of what this man has said will enter Paradise."
حدثنا هارون بن معروف وقال عبد الله وسمعته أنا من هارون قال حدثنا عبد الله بن وهب قال أخبرني عمرو بن الحارث أن بكير بن الأشج حدثه أن علي بن خالد الدؤلي حدثه أن النضر بن سفيان الدؤلي حدثه أنه
كنا مع رسول الله ﷺ بتلعات اليمن فقام بلال ينادي فلما سكت قال رسول الله ﷺ من قال مثل ما قال هذا يقينا دخل الجنة
Its isnad is sahih. Ali bin Khalid Duwali narrates from Abu Hurairah and also from Nadr bin Sufyan Duwali from Abu Hurairah. This hadith was also narrated by Nasai in abbreviated form from both of them here, 1:109, where his name is given as Ali bin Khalid Zarqi, which is certainly a mistake.It was also narrated by Hakim through the route of Ibn Wahb, from Amr bin Harith, from Bukayr, from Ali bin Khalid Duwali, that he heard Abu Hurairah. So either Ali heard it directly from Abu Hurairah and also from Nadr from Abu Hurairah, narrating it once this way and once that way, or Nadr has dropped out of the isnad in Hakim's version, 1:204, where both he and Dhahabi graded it sahih.