Silsilat al-Ahadith al-Sahihah

The Messenger of Allah (peace and blessings be upon him) said: "Abu Bakr and Umar are the leaders of the elderly people who will enter Paradise from the first and the last (of mankind)." This hadith is narrated from Sayyiduna Ali bin Abi Talib, Sayyiduna Anas bin Malik, Sayyiduna Abu Juhaifah, Sayyiduna Jabir bin Abdullah, and Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with them).