The Messenger of Allah ﷺ said, "My Lord, You created me as the master of the children of Adam, and I say this without boasting. I will be the first whom the earth opens up for on the Day of Resurrection, and I say this without boasting. So many will come to me at the Pool that their numbers will exceed the distance between Sanaa and Aylah."
قال رسول الله ﷺ أي رب خلقتني سيد ولد آدم ولا فخر، وأول من تنشق عنه الأرض يوم القيامة ولا فخر، حتى إنه يرد علي الحوض أكثر مما بين صنعاء وأيلة.
Imam Ahmad narrated it (15) from Ibrahim bin Ishaq Talaqani, who said, Nadr bin Shumayl Mazini told me, who said, Abu Nuama told me, who said, Abu Hunaida Bara bin Nawfal told me, from Walan Adawi, from Huzaifa, from Abu Bakr Siddiq, in a long hadith. Its isnad is hasan. See its full referencing in Shafaah Kubra.