From Imaam al-Dhahabi (rahimahullaah) who narrates in al-Siyar, the following:

Aboo Tha’labah Al-Khushanee …
Good Endings at Death (Husn Al-Khaatimah) (1) : Abu Tha'labah, Umar Bin Abd Al-Azeez and Alee Bin Saalih
Be taught More
http://piousmuslim.com/articles/xaxgkuw-real-endings-husn-al-khaatimah-1–abu-thalabah-umar-bin-abd-al-azeez-and-alee-bin-saalih.cfm