Abdullah ibn Umar said: The Messenger of Allah, peace and blessings be upon him, led us in the night prayer one night at the end of his life. When he gave the greeting of peace, he stood and said: "Do you see this night of yours? At the head of one hundred years from it, there will not remain on the face of the earth a single one of those who are upon it today." Ibn Umar said: So the people were alarmed by that saying of the Messenger of Allah, peace and blessings be upon him, regarding what they would relate of these hadiths about one hundred years. But the Messenger of Allah, peace and blessings be upon him, only said: "There will not remain of those who are today upon the face of the earth a single one," meaning that that generation would pass away.

(1) Its chain of transmission is authentic. Abu Bakr ibn Sulayman: he is Ibn Abi Hathmah.
It was also recorded by al-Bukhari (116), Muslim (2537), al-Tirmidhi (2401), and al-Nasa'i in al-Kubra (5840) through various chains from al-Zuhri, from him.
It is in Musnad Ahmad (5617) and Sahih Ibn Hibban (2989).
Muslim recorded in his Sahih that Abu al-Tufayl Amir ibn Wathilah was the last of the companions of the Messenger of Allah, peace and blessings be upon him, to die, and that his death was in the year one hundred of the Hijrah.
Al-Suhayli transmitted from al-Bukhari and a group of hadith scholars the death of al-Khidr, peace be upon him, the companion of Moses, peace be upon him, before the completion of one hundred years of the Hijrah. He said: And our teacher Abu Bakr ibn al-Arabi supported this based on his saying, peace and blessings be upon him, in this hadith of Ibn Umar: "At the head of one hundred years, there will not remain on the earth of those who are upon it a single one," meaning those who were alive at the time of this statement.
Al-Hafiz Ibn Hajar said in al-Fath 6/434: Those who asserted that al-Khidr does not exist now are al-Bukhari, Ibrahim al-Harbi, Abu Ja'far ibn al-Munadi, Abu Ya'la ibn al-Farra', Abu Tahir al-Abadi, Abu Bakr ibn al-Arabi, and a group. Their basis is this hadith of Ibn Umar and the hadith of Jabir ibn Abdillah... And among the proofs of those who denied his being alive is His saying, the Exalted: {And We did not grant to any human being before you eternity} [al-Anbiya: 34], and the hadith of Ibn Abbas: "Allah did not send any prophet without taking from him the covenant that if Muhammad were sent while he was alive, he would believe in him and support him" — recorded by al-Bukhari [as it appears therein, although al-Bukhari did not record this report from Ibn Abbas. Muhammad ibn Yusuf al-Salihi said in al-Sirah al-Shamiyyah, known as Subul al-Huda wa al-Rashad 1/91: Al-Bukhari recorded it in his Sahih as was transmitted =