The Messenger of Allah ﷺ said, "I will be the first whom the earth splits open for, then Abu Bakr, then Umar. Then I will come to the people of al-Baqi, and they will be gathered with me. Then I will wait for the people of Mecca until I am gathered between the two sanctuaries."
حدثنا سلمة بن شبيب حدثنا عبد الله بن نافع الصائغ حدثنا عاصم بن عمر العمري عن عبد الله بن دينار
قال رسول الله ﷺ أنا أول من تنشق عنه الأرض ثم أبو بكر ثم عمر ثم آتي أهل البقيع فيحشرون معي ثم أنتظر أهل مكة حتى أحشر بين الحرمين
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Sourcing, its isnad is daif. Ibn Adi narrated it in 5/1870 through Abdullah bin Nafi, and Hakim graded it sahih in 3/68, but Dhahabi challenged him, saying, "Asim is the brother of Abdullah, they graded him daif." It has a corroborating narration that is munkar. Mizan al-Itidal, 2/465, (466).