As for those who strive in Us,
We surely guide them to Our paths (Quran)
“Abd Al-Rahman bin Udays Al-Balawi Al-Misri: He witnessed Al-Hudaibiyah. Asad bin Mus...a mentioned from ibn Lahi'ah, from Yazid bin Abi Habib, who said: "Abd Al-Rahman bin Udays Al-Balawi was one of those who gave Bay'ah to the Messenger of Allah (saw), under the tree." Aboo Umar said, "He was the commander of the army that came from Egypt to Madinah, the army that besieged Uthman and murdered him."
Source: Al-Isti'ab. Vol. 2, Pg. # 840. H. # 1438.
Available From: "Revisiting The Salaf" Blog, with some editions.
Now this is another refutation for those who claim that all of those who gave Bay'ah (allegiance) to the Messenger of Allah (saaw), under the tree are all Just Sahaba, who will be rewarded with Paradise!
Read the following about 'Abd Al-Rahman bin Udays', who was one of those who gave Bay'ah under the tree and ended up as a commander of the army which Killed the 3rd Caliph Uthman Bin Affan!