Zubayr Ibn al-Awaam رضي الله عنه
(S49)
The rumour that the Messenger ﷺ had been martyred at Uhud caused the Companions رضي الله عنهم to react in 4 ways:
Group 1: This group رضي الله عنهم upon hearing the news regrouped at Madinah. Included in this group is Uthmaan Ibn Affaan رضي الله عنه.
Group 2: This group رضي الله عنهم went to mount Uhud to get a better view and see if the Messenger ﷺ had actually been martyred. Included in this group was Umar رضي الله عنه.
Groups 1 and 2 were forgiven. (Surah [3:152, 155 and 159]).
Group 3: This group رضي الله عنهم upon hearing the rumour decided to go all out, to fight to death. Included in this group was Abu Bakr and Ali رضي الله عنهم.
Group 4: This group رضي الله عنهم stayed right next to the Messenger ﷺ and defended him ﷺ, thus the rumour didn’t make a difference to them. Included in this group was Talha رضي الله عنه. It is most likely that Zubayr رضي الله عنه was included in this group also, or he could have been in group 3. Allah سُبْحَانَهُ وتَعَالَى knows best.