مسند أحمد

It was narrated from Ibn Abu Mulaikah that he heard Ibn `Abbas say: When `Umar bin al Khattab (رضي الله عنه) was placed on his bier, the people gathered around him, praying and invoking blessings upon him before [the bier] was lifted up, and I was among them. No one alarmed me except a man who seized me by the shoulder from behind. I turned and saw that it was ‘Ali bin Abi Talib (رضي الله عنه). He prayed for mercy for ‘Umar (رضي الله عنه), then he said: You have not left behind anyone more dear to me, with the like of whose deeds I would hope to meet Allah, than you. By Allah, I think that Allah will most certainly join you to your two companions, and that is because I often heard the Messenger of Allah (ﷺ) saying, `Abu Bakr, `Umar and I went; Abu Bakr, `Umar and I came in; Abu Bakr, ‘Umar and I went out.” So I think that Allah will most certainly join you to them.